Find missing angles

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

What is the definition of a complementary angle?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is the definition of a supplementary angle?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

How do you find the measure of an unknown angle in a triangle?

Back

To find the measure of an unknown angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is the relationship between interior and exterior angles of a triangle?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

How do you calculate the missing angle in a linear pair?

Back

In a linear pair, the two angles are supplementary, so subtract the measure of one angle from 180 degrees to find the missing angle.

Front

What is the definition of vertical angles?

Back

Vertical angles are the angles opposite each other when two lines intersect, and they are always equal.

Front

What is the formula for finding the measure of an angle in a polygon?

Back

The measure of each interior angle of a regular polygon can be found using the formula: (n-2) * 180/n, where n is the number of sides.

Front

What is the definition of an angle bisector?

Back

An angle bisector is a line or ray that divides an angle into two equal parts.