KR20040052876A - Drawing protractor - Google Patents

Abstract

PURPOSE: A drawing protractor is provided to integrate various tools so as to be used in overall diagram studying classes. CONSTITUTION: The drawing protractor has a reference ruler. The reference ruler is attached bellow the protractor and is pivoted on the center of the protractor. The reference ruler is scaled and has a lot of holes at regular intervals. Drawing a line, protracting angle, drawing various types of figures, etc. are possible.

Description

Shape protractor {omitted}

It is possible to draw a shape using a protractor compass rule in mathematical figure time. It is a learning material that can reduce the inconvenience of preparing three things, measure the drawing easily, reduce the number of drawing of the figure, quickly and accurately, and develop logical thinking.

Conventional protractors have difficulty in measuring angles with line lengths that are longer or shorter than those of protractors.

1, When you know the length and angle of both sides, to draw a triangle, you need to use the length ruler, the angle ruler, and the angle protractor.

2, knowing the length of the three sides, drawing a triangle is a hassle to create a vertex by measuring the length with a compass and cm

3, When you know the length of one side and the size of both ends, it is troublesome to draw a triangle, measure the length, and use the compass to make the angled vertex

4, Hassle to use ruler and compass when drawing circle by unit

Elementary Mathematics Shape Drawing, angle drawing, angle drawing, fan drawing, regular hexagon drawing, triangle drawing if you know the length, triangle line when you know the length of one side, parallel line, It can be used for the whole plan-type learning, such as repair, line drawing, circle drawing, various figure drawing, and equal division.

a Lower terminal b Baseline c Protractor d Reference ruler e Reference line f Pencil hole g Rubber point

h center point

* The protractor was hollowed out.

Ⓐ You can draw a line by attaching a ruler to the bottom of the protractor

Ⓑ baseline

Ⓒ You can read the angle by indicating the angle (180 degrees) as a half circle (circle).

Ⓓ The reference can be rotated on the underside of the protractor.

Ⓔ The reference line is used to read the scale as the center line of the standard.

Ⓕ Use the pencil hole to cut the angle by 5mm intervals.

ⒼThe rubber point is fixed so that the protractor does not move.

Ⓗ the center point makes the reference point move and becomes the center point.

Line Segmentation: The lower end can draw and measure all line segments in the elementary mathematics class.

Stitching: Align the reference point with the protractor at 0 degrees and align the reference point with one line and move the reference point to align the reference line with the rest of the line.

Draw an angle: Draw a line segment using the lower end line Align the line segment to the base line, turn the ruler to the desired angle, draw a point in the pencil hole, and connect the lower point to the use base point and the pre-set point.

Draw a fan shape (3 쎈 radius, 60 degrees center): Draw 3 미터 radius as the lower part. Align the center point of the reference point with the center point, turn the reference point, draw a dot in the pencil hole and draw a semicircle at an angle of 60 degrees with the reference line. Move the lower end to draw a line.

Regular hexagon drawing: Draw the center line with the lower end, move the reference point to the center point, and mark the position of the corner point in the pencil hole every 60 degrees in the protractor.

Draw an isosceles triangle: Draw a triangle with the lower end. Draw an arc with the pencil hole of the ruler along the length of the equilateral equivalence and complete the vertex with the vertex position marker bottom.

Draw the triangle when you know the length and angle of both sides (6 centimeters, 5 centimeters, 70 degrees): Draw the length of one side of 6 centimeters with the bottom terminal. Turn the reference ruler to align the 70 degrees of the protractor with the reference line, Mark position and complete vertex with lower end

Draw a triangle when you know the length of three sides (4, 5, 6). Draw the longest 6 centimeters as the bottom line. Match the base line and insert a pencil at 5 centimeters of the pencil hole of the standard line on one side and rotate the arc. Draw a pencil in the 4 에 of the standard pencil hole and draw an arc.

Draw a triangle when you know the length of one side and the size of both ends (30 degrees, 60 degrees, 4 centimeters): Draw a 4 centimeter line using the lower end ruler. Measure 60 degrees from the centerline of the pencil and draw a dot with a pencil in the pencil hole.

Parallel, repair, and vertical lines: Draw a line with the lower end, align the base line, and attach two to three dots to each pencil hole.

Circle: Draw a semicircle by turning the pencil into the pencil hole of the ruler and flip it over to draw the rest.

Drawing various shapes: Mark the vertex position with a pencil in the pencil hole of the ruler for each size centered on the base line, and turn the protractor and the ruler to display the other half, followed by the vertex with the bottom.

Dividing an arbitrary line with the lower terminal, dividing the point by 360 degrees as the equal division can be made.Take an arbitrary line with the base line.Move the standard to divide the angle to equally divide the protractor. Display

Connected to the lower end to complete.

Reading protractors, drawing angles, drawing triangles, drawing regular polygons, drawing congruent shapes, drawing similar shapes, parallel lines, repairs, vertical lines, drawing, etc., makes learning the shapes easier and more fun.

Claims (1)

The lower part can be made and diversified in stages such as 10 쎈, 20 쎈, 30 쎈. It can be manufactured in a circle (360 degrees) by thinning the lower end.