Help, there is no way to draw the number of angles with a protractor

<>Here are some ways to draw angles without a protractor:1Estimate with your fingers:

Spread the fingers of one hand apart with each finger width about 15 degrees. Using this as a benchmark, estimate the number of angles that need to be drawn with your fingers. 2.

Use right triangles: Draw a right triangle on a piece of paper, find the right angle (90 degrees), and use trigonometric functions to calculate the magnitude of the other angles. 3.

Use Circles: Draw a circle on the center of a dot on the drawing paper. Any two rays are then drawn from the center of the circle, which are angles (90 degrees) perpendicular to each other.

4.Refer to known angles: If the known angle is 60 degrees, you can use geometric knowledge to deduce the size of the angle adjacent to this angle, for example, in an equilateral triangle, the other two angles are also 60 degrees each.

Method 1: Spread your fingers as far as possible and place your palm on the surface of the angle you want to measure. The little finger should be at the bottom, representing 0°. The angle between the thumb and the little finger is 90°, and the angle between the little finger and the other fingers is ° and 60°, respectively.

Method 2: If you don't have a protractor, you can draw corners with the help of a triangular ruler, and the following demonstrates the skills of using a triangular ruler to draw corners:

1. First of all, the most basic, there are two triangular rulers, one of which is °; The other is two 45° and one 90°, and if you want to draw a 30° angle, take out the first triangle.

2. Then draw two straight lines along the 30° angle of the first triangular ruler to get a 30° angle, and the other angles are the same.

3. Another pair of three angles can not only draw °, but also draw the angle of the sum of any two of these three angles, such as using a pair of triangles to piece together a 70° angle (30°+45°).

4. At this time, draw two straight lines along the two triangle rulers to get a 75° angle, and the operation method of other angle patchwork is the same.

Method 3: Fix the length of one stick.

The thread (wool, sewing thread, etc.) is tied to the pen (chalk, pencil, etc.) at one end, and the thumb of the left hand of both hands is fixed without the end of the pen, and the other hand drives the pen to rotate a circle.

If you don't have a protractor, there is also a way to use the degree of the flower angle, you first know that there is a scale, you can use this compass to decompose the name Du wireless, and also use the abbreviation of 45 degrees of angle first. Degree. Or if there is a version of the bird, you can score 30 degrees, 60 degrees, 90 degrees, 45 degrees, or three equal points, so that you can quickly draw other angles.

Take the vertex of the corner as the center of the circle, draw a circle, and intersect the two sides of the corner at two points ab. Measure ab with a compass, take A or B as the starting point, draw a small solitary to one side, intersect the circumference of the point C, and then take C as the starting point, and repeat the above process.

With the help of a triangular ruler to draw an angle of 30°, the following demonstrates the technique of using a triangular ruler to draw angles: 1. First of all, the most basic, there are two triangular rulers, one of which is °,

Draw an isosceles right triangle with a ruler, and use a compass as half of the bisector of the base angle to be ,

There is no protractor for 130-degree angles, and triangular rulers and compasses are generally used.

The method used as a diagram can be drawn.

90 degree triangular ruler plus 60 degree angle, 150 degrees of dust, and then 60 degrees in three equal parts, subtract 1 3 is 20 degrees. You Brother Chong will get 130. There is also a method of divine annihilation, using only a compass, dividing 180 degrees into two to get 90 degrees, and then dividing 90 degrees into thirds, taking one part, getting 120 degrees, and then dividing one part into threes, getting 10 degrees, and finally getting 130 degrees.

It is right that you can draw an angle of any degree with a protractor, because the protractor is a tool for measuring angles, so you can measure the degree of any angle with a protractor. A protractor is a drawing tool, usually made of plastic or iron, and can be used to draw the desired angle as needed. Often with compasses.

Used together. You can draw angles, measure angles, draw vertical lines, parallel lines, measure inclination, and verticality of air and tumbling.

Horizontality, can be used as an internal and external right-angle ruler, open, close, can be used as a long and short ruler can also be read more intuitively, and draw the specified size of the inch. In order to make up for the singleness of the protractor in use and the inconvenience of carrying and storage, a multi-purpose method is generally adopted, so that the protractor has flexibility and comprehensiveness and has no practical value, simple structure, novel and unique shape, reasonable design, so as to improve work efficiency, and embodies the social benefits.

To draw a 125-degree angle, you can use the following steps:

Determine the center of the corner and the edge of a corner.

Draw a circle in the center of the corner.

Rotate one side of the corner 25 degrees so that it is 125 degrees away from its original position.

Connect the other side of the corner to the fifth bisecting point on the circle.

Connect another edge of the corner to the center of the circle.

This makes it possible to draw a 125-degree angle.

Note: If you don't have a protractor or triangular ruler, then you may need to pass the trace to determine the size of the angle by manually measuring it. For example, you can use two rulers or lines and measure the two sides of an angle, and then calculate the size of the corner based on the definition of the corner.

Place the protractor horizontally, draw a line with the center of the protractor as the origin, and then find the 15 degrees on the protractor to make a trillion mark, then take away the protractor, connect the origin and the marked place, and the angle at this time is 15 degrees.

The unit of measurement for an angle.

It is the "degree" represented by the symbol ", and the protractor is divided into 180 equal parts, and the angle of each part is called the angle of one degree. It is recorded as the "1°" family eggplant spring.

Hello, you can use a straightedge and compass to draw a 100-degree angle. The specific methods are as follows:1

Use a ruler to draw a line segment as one of the sides of the corner. 2.Use a compass to draw an arc at one of the ends of the sum side so that it intersects the edge at one point, as the other side of the angle.

3.Without moving the distance of the compass, move it to the intersection of the arc you just drew and draw another arc. 4.

A ruler is used to connect the intersection of the two arcs and the rough end of the line segment to obtain a 100-degree angle. It is important to note that the angles obtained by this method are not precise enough, if you need a more precise angle, use a professional protractor.