1, common triangular ruler

In mathematics, the commonly used triangular ruler is composed of two right triangles with different angles. One right triangle is 45-45-90, and the other is 30-60-90.

2. Compare the size of two right angles.

To find the maximum angle in the auxiliary triangular ruler, it is necessary to compare the sizes of these two right angles. Through simple angle comparison, it is found that these two right angles are both 90.

3. Determination of the maximum angle

Because these two right angles are the same size, both are 90 degrees, it can be determined that the largest angle in the auxiliary triangular ruler is 90 degrees. This angle is provided by a right triangle of 45-45-90 degrees.

Use of triangular ruler

1, mathematical drawing

Triangular ruler plays an important role in mathematical drawing. It can help draw various geometric figures, such as triangles, parallelograms and ellipses. By using the triangular ruler, you can ensure that the drawn graphics are accurate and easy to understand.

Step 2 measure the angle

A triangle ruler is a protractor, which can be used to measure angles. It usually has a scale of 90 degrees and 45 degrees, and can be used to measure right angles, acute angles and obtuse angles. In addition to measuring angles and drawing geometric figures, triangular rulers can also be used to assist in calculations.

For example, you can compare the sizes of two angles with a triangular ruler, which is very useful for solving some geometric problems. In addition, the trigonometric ruler can also be used to determine multiples or fractions of certain angles.

Step 3 emphasize

Triangular rulers can also be used to draw lines. You can easily draw a straight line or a parallel line by putting the triangular ruler in the position where you need to draw a line and drawing a line along the edge of the triangular ruler with a pencil.

This marking method is very practical in making charts and drawing. In a word, the triangular ruler is a very practical tool, which is widely used in geometry and other fields. Using a triangular ruler can simplify the measurement and calculation process and improve the efficiency of solving problems.