CN210941088U

CN210941088U - Multifunctional set square with special angle

Info

Publication number: CN210941088U
Application number: CN201921571755.1U
Authority: CN
Inventors: 苏德辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-20
Filing date: 2019-09-20
Publication date: 2020-07-07
Anticipated expiration: 2029-09-20

Abstract

The utility model discloses a multifunctional triangular ruler with special angles, wherein one angle of the triangular ruler is a right angle, a round hole is arranged in the triangular ruler, and the round hole is an intersection point of angular bisectors; wherein, the side length of a right-angle side of the triangular ruler is 12 cm, and the bevel edge is 15 cm. The utility model has the advantages that: formulas that help students remember special angles; the students can remember the theorem and the property of the angular bisector; the student can find the inner center of the triangle quickly, and the symmetrical graph can be found through rotation.

Description

Multifunctional set square with special angle

Technical Field

The utility model relates to a teaching aid technical field especially relates to a set square of multi-functional special angle.

Background

A set square is a drawing tool and mainly comprises three corners and three sides, and a right-angle set square and an equiangular set square are generally arranged. The triangle is provided with ruler edges with angles of 45 degrees, 90 degrees, 30 degrees, 60 degrees and 90 degrees. A set square is matched with a T-square, and a series of vertical lines can be drawn according to the sequence from bottom to top. The T-square is matched with a set square to draw straight lines of 30 degrees, 45 degrees and 60 degrees, and oblique lines are drawn according to the principle of left to right when drawing. Two set squares are matched with a T-square to draw 15-75-degree oblique lines. The two set squares are matched to draw the parallel line of any one drawing line.

The set square is also often used as an auxiliary drawing tool in the office process, and the existing set square has single function and influences the application range of the set square.

Therefore, there are several problems with the current set squares on the market:

firstly, the function is single;

secondly, according to the study of the current junior middle school students, the function of the common triangular ruler on the students is smaller and smaller, the functions of measuring and the like of a special angle are not available, and the function of the triangular ruler is the same as that of the straight ruler.

SUMMERY OF THE UTILITY MODEL

This section is for the purpose of summarizing some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract of the specification and the title of the application to avoid obscuring the purpose of this section, the abstract of the specification and the title of the application, and such simplifications or omissions are not intended to limit the scope of the invention.

The present invention has been made in view of the above and/or other problems occurring in the prior art.

Therefore, one of the purposes of the present invention is to provide a multifunctional triangle with special angles.

In order to solve the technical problem, the utility model provides a following technical scheme: a multifunctional triangular ruler with special angles is characterized in that one angle of the triangular ruler is a right angle, a round hole is formed in the triangular ruler, and the round hole is an intersection point of angular bisectors; wherein, the ratio of hypotenuse and right-angle side is 5: 4: 3

As a preferred scheme of multi-functional special angle's set square, wherein: the side length of a right-angle side of the triangular ruler is 12 cm, and the bevel edge is 15 cm.

As a preferred scheme of multi-functional special angle's set square, wherein: the side length of the set square is 12 cm, and the scale 0 of the right-angle side is in the middle.

As a preferred scheme of multi-functional special angle's set square, wherein: the set square is made of transparent frosted materials.

As an optimal scheme of the multifunctional special-angle triangular ruler, the multifunctional special-angle triangular ruler further comprises a first bisector and a second bisector, wherein the first bisector and the second bisector are angular bisectors of two acute angles, the first bisector bisects the acute angle α, and the second bisector bisects the acute angle β.

As a preferred scheme of multi-functional special angle's set square, wherein: the acute angle of the included angle of the first bisector and the second bisector is 45 degrees.

As a preferred scheme of multi-functional special angle's set square, wherein: the multifunctional ruler also comprises a midline which is a connecting line from the right angle of the triangular ruler to the middle point of the hypotenuse.

As a preferable scheme of the multifunctional special-angle triangular ruler of the utility model, the acute angle α and the acute angle β are as follows:

wherein the content of the first and second substances,

wherein the content of the first and second substances,

the utility model has the advantages that:

(1) formulas that help students remember special angles;

(2) the students can remember the theorem and the property of the angular bisector;

(3) the student can quickly find the inner center of the triangle, and the symmetrical graph can be found by rotation;

(4) the scale 0 of the right-angle side is in the middle, so that symmetrical patterns can be conveniently drawn.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor. Wherein:

fig. 1 is a schematic view of the overall structure of an embodiment of the multifunctional triangle with special angles of the present invention;

fig. 2 is a schematic structural view of the multifunctional triangle with special angles according to the present invention after the overall structure is rotated in one embodiment;

fig. 3 is a schematic view of an exemplary structure of an embodiment of the multifunctional triangle with a special angle according to the present invention.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying the present invention are described in detail below with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the specific details set forth herein, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

Furthermore, the references herein to "one embodiment" or "an embodiment" refer to a particular feature, structure, or characteristic that may be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 and 2, the utility model relates to a set square of multi-functional special angle, one of them angle of set square is the right angle, and its inside round hole 100 that is equipped with, round hole 100 is the nodical of angular bisector, and the ratio of hypotenuse and right-angle side is: 5: 4: 3.

preferably, in this embodiment, one of the right-angled sides of the triangular ruler has a side length of 12 cm and a hypotenuse side of 15 cm.

The meaning of the right triangle with the side length of 12 cm and 15 cm is that the triangle with the ratio is used more, the angle formed by the triangle is a special angle, the triangle needs to be memorized by middle school students, and the use frequency is higher.

The circular hole 100 is formed to be recessed from the upper surface to the lower surface of the triangular ruler. Because the circular hole 100 is the intersection point of the angular bisectors, the circular hole 100 is the inner center of the triangular ruler, the inner center is the center of the inscribed circle, and the distances from the inner center to each side of the triangle are equal. In junior middle school mathematics, the situation that a figure needs to be rotated is often met, corresponding points need to be rotated respectively in a conventional method, a ruler is used for solving problems, the number of steps is large, and errors are easy to occur.

It should be noted that the set square is made of transparent frosted materials, and the set square can be placed on a graph through the transparent frosted materials to find out corresponding points and answer test questions. The transparent frosted material has the following advantages: when the pencil is used, an original pattern can be drawn on the frosted material through the pencil, so that the pattern can be seen more visually when the pattern is seen in a rotating mode, after the question is made, the pencil mark can be erased through the eraser, and the pencil can be used repeatedly next time.

The hollow point of the circular hole 100 can be fixed on the corresponding point by a pen, the transparent frosted ruler surface is convenient for directly drawing a graph on the ruler by a pencil, and the corresponding rotating graph is completed by rotating the ruler surface, so that the method is very visual, and the error probability is very low.

For example, referring to fig. 2, when a pen is placed in the circular hole 100, the rotating triangular ruler is rotated from the solid line portion to the dotted line portion, because the triangular ruler is made of a transparent frosted material, so that the student can see the rotating position and angle when drawing. In the figure, a triangle ABC is taken as an example, if a vertex angle A needs to be moved to a vertex angle B by the triangle in a question stem, a midpoint D is taken on an edge AC, the midpoint D coincides with a round hole 100 by the point D, then the original triangle is drawn on a frosted surface, the round hole 100 is placed by a pen, the position of the round hole 100 and the position of the point D are fixed, then the triangular ruler is rotated until the triangle A 'B' C 'is rotated, at the moment, the vertex angle A coincides with the vertex angle B' by the triangle, so that a student can draw a rotating graph more quickly, or the student can draw an auxiliary line quickly.

Example 2

Referring to fig. 1 and 2, the present invention provides a second embodiment of a multifunctional special-angle triangular ruler, which is different from the first embodiment: the side length of the set square is 12 cm, and the scale 0 of the right-angle side is in the middle. The scale 0 is arranged in the middle, so that a turning graph or a symmetrical graph can be drawn conveniently.

Specifically, one of the corners of the triangular ruler is a right angle, a circular hole 100 is formed in the triangular ruler, the circular hole 100 is an intersection point of angular bisectors, the side length of a right-angle side of the triangular ruler is 12 cm, and the bevel edge is 15 cm.

Preferably, the side length of the set square is 12 centimeters, and the scale 0 of the right-angle side is in the middle. Because some symmetrical figures need to be drawn in the early stage of junior middle school students, when a conventional ruler is used for drawing, the distance from the symmetrical center to each point needs to be measured, and then the distance from the symmetrical center to the rotating position is measured from the other side, so that the drawing is troublesome. For example, measuring 2 cm on the left, the right is plotted for the 2 cm measurement.

The circular hole 100 is formed to be recessed from the upper surface to the lower surface of the triangular ruler.

In junior middle school mathematics, the situation that a figure needs to be rotated is often met, corresponding points need to be rotated respectively in a conventional method, a ruler is used for solving problems, the number of steps is large, and errors are easy to occur.

The triangular ruler is made of transparent frosted materials.

Example 3

The utility model discloses a third embodiment that multi-functional special angle's set square provided, this embodiment is different from the second embodiment is that in this embodiment, the set square still includes first bisector 201 and second bisector 202, first bisector 201 and second bisector 202 are the bisector of two acute angles respectively, and wherein, first bisector 201 bisects acute angle α, and second bisector 202 bisects acute angle β.

Preferably, the side length of the set square is 12 centimeters, and the scale 0 of the right-angle side is in the middle.

The triangular ruler is made of transparent frosted materials.

Preferably, the triangular ruler further comprises a first bisector 201 and a second bisector 202, the first bisector 201 and the second bisector 202 are bisectors of two acute angles, respectively, wherein the first bisector 201 bisects the acute angle α and the second bisector 202 bisects the acute angle β.

Students using the triangular rule are asked to remember the proportionality theorem of the angle bisector by the first angle bisector 201 and the second bisector 202.

For example, at △ ABC in FIG. 3, the bisector AD intersects BC at point D, then

Preferably, the included angle between the first bisector 201 and the second bisector 202 is an acute angle of 45 °.

The acute angle α and the acute angle β are:

preferably, the triangular rule in this embodiment further comprises a midline 203, and the midline 203 is connected from the right angle of the triangular rule to the midpoint of the hypotenuse.

It should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a set square of multi-functional special angle which characterized in that: the triangular ruler is a right triangle, a round hole (100) is arranged at the intersection point of angular bisectors of the triangular ruler, and the round hole (100) is the intersection point of the angular bisectors;

wherein, the ratio of hypotenuse and right-angle side is 5: 4: 3; the round hole (100) is formed by inwards sinking from the surface of the triangular ruler.

2. The multi-functional special angle square according to claim 1, wherein: the side length of the set square is 12 cm, and the scale 0 of the right-angle side is in the middle.

3. The multi-functional special angle square according to claim 2, wherein: the side length of a right-angle side of the triangular ruler is 12 cm, and the bevel edge is 15 cm.

4. The multi-functional special angle square according to claim 3, wherein: the set square is made of transparent frosted materials.

5. The multi-functional special angle square according to claim 4, wherein: the device also comprises a first angle bisector (201) and a second bisector (202), wherein the first angle bisector (201) and the second bisector (202) are angle bisectors of two acute angles respectively;

wherein the first bisector (201) bisects the acute angle α and the second bisector (202) bisects the acute angle β.

6. The multi-functional special angle square according to claim 5, wherein: the included angle between the first bisector (201) and the second bisector (202) is an acute angle of 45 degrees.

7. The multi-functional special angle square according to claim 5 or 6, wherein: also included is a midline (203), the midline (203) connecting from the square right angle to the midpoint of the hypotenuse.

8. The multi-functional special angle triangular rule of claim 7, wherein the acute angles α and β are:

wherein the content of the first and second substances,

wherein the content of the first and second substances,