Angles & Radian Measures

Front

What is a coterminal angle?

Back

Coterminal angles are angles that share the same terminal side when drawn in standard position. They can be found by adding or subtracting multiples of 360° (or 2π radians).

Front

Find a coterminal angle to -90°.

Back

-450°

Front

Find a coterminal angle to 45°.

Back

405°

Front

What is the relationship between degrees and radians?

Back

Degrees and radians are two units for measuring angles. To convert degrees to radians, use the formula: radians = degrees × (π/180).

Front

Convert 150° to radians.

Back

Front

What is the formula to find a positive coterminal angle?

Back

To find a positive coterminal angle, add 360° (or 2π radians) to the given angle.

Front

What is the formula to find a negative coterminal angle?

Back

To find a negative coterminal angle, subtract 360° (or 2π radians) from the given angle.

Front

Find the negative and positive coterminal angles of 240°.

Back

600°, -120°

Front

What is the degree measure of a full rotation?

Back

A full rotation is 360°.

Front

What is the degree measure of a right angle?

Back

A right angle measures 90°.