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Triangle rule and method for drawing triangles and circles using the same

A triangular gauge and triangle technology, applied in the field of triangular gauges, to achieve the effect of speeding up the drawing speed

Active Publication Date: 2021-06-22
萧淑芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Among the stationery on the market, you can use a triangle ruler and a protractor to draw a triangle, and you can use a compass to draw a circle. There is no stationery that can draw both triangles and circles.

Method used

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  • Triangle rule and method for drawing triangles and circles using the same
  • Triangle rule and method for drawing triangles and circles using the same
  • Triangle rule and method for drawing triangles and circles using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Draw a triangle with three known angles:

[0044] When the user draws a triangle with three known angles, the following steps can be performed for drawing.

[0045] see Figure 6A , put the triangular gauge on the paper, put the pointer 2 on the 0 scale, and mark a point on the 0 scale with a pen.

[0046] see Figure 6B , mark another point clockwise under the degree you want;

[0047] see Figure 6C , mark a point counterclockwise at your second desired degree.

[0048] see Figure 6D , take away the triangular gauge, connect the three points with a straightedge, and finally list the degrees of the three points.

[0049] Using the length markings on pointer 2, we can draw similar triangles of different sizes but the same shape.

Embodiment 2

[0051] Draw a triangle with known two corners and one side (side length is the included side):

[0052] When the user draws a triangle with known two corners and one side (the side length is the included side), the following steps can be performed for drawing.

[0053] see Figure 7 , use the pointer 2 to draw a line segment of length a, mark the two ends as A and B; place the center of the triangular compass on A, the 0 scale line overlaps with AB, twist the pointer 2 to the required angle, mark and connect; Place the center of the circle on B, twist the pointer 2 to the required angle, mark and connect, the intersection of the two lines (vertex C) is the intersection of the third angle of the triangle.

Embodiment 3

[0055] Draw a triangle with known two angles and one side (side length is non-included):

[0056] When the user draws a triangle with known two corners and one side (the length of the side is not included), the following steps can be performed for drawing.

[0057] see Figure 8 , the angle α and the angle β are known, the user only needs to use the sum of the interior angles of the triangle to find ∠CBA, after obtaining ∠CBA, the user can use the triangle drawing method of the embodiment 2 to draw.

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Abstract

The invention provides a triangular compass and a method for drawing triangles and circles by using the triangular compass. The advantage of the present invention is that triangles with arbitrary angles and side lengths and circles of different sizes can be conveniently drawn with the triangular compass. This tool will greatly speed up the drawing speed of students, and is of substantial help in teaching the properties of triangles or circles.

Description

technical field [0001] The invention relates to the field of drawing tools, in particular to a triangular compasses and a method for drawing triangles and circles using the triangular compasses. Background technique [0002] Among the stationery on the market, triangles and protractors can be used to draw triangles, and compasses can be used to draw circles. There is no stationery that can draw both triangles and circles. Therefore, it is necessary to provide a new drawing tool that can draw both triangles and circles. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a triangular gauge and a method for drawing triangles and circles using the triangular gauge. [0004] In order to solve the above problems, the present invention provides a triangular gauge, including a scale turntable and at least one pointer, a first angle scale is arranged on the periphery of the scale turntable, a groove is arranged at the cente...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43L7/027B43L9/02
CPCB43L7/0275B43L9/02
Inventor 萧淑芬
Owner 萧淑芬
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