Angle Measures Part 2

Front

What is the definition of an angle?

Back

An angle is formed by two rays (sides of the angle) that share a common endpoint (the vertex).

Front

What are the different types of angles based on their measures?

Back

The different types of angles based on their measures are: acute (less than 90°), right (exactly 90°), obtuse (greater than 90° but less than 180°), straight (exactly 180°), reflex (greater than 180° but less than 360°), and full rotation (exactly 360°).

Front

What is a complementary angle?

Back

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

Front

What is 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 angle when given its complement?

Back

To find the measure of an angle when given its complement, subtract the measure of the known angle from 90 degrees.

Front

How do you find the measure of an angle when given its supplement?

Back

To find the measure of an angle when given its supplement, subtract the measure of the known angle from 180 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal; they are the angles opposite each other when two lines intersect.

Front

What is the sum of the interior angles of a triangle?

Back

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

Front

What is the exterior angle theorem?

Back

The exterior angle theorem states that the measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.