Coterminal, Reference Angles and Conversion

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 degrees (or 2π radians).

Front

Find a coterminal angle to 200 degrees.

Back

-520 degrees.

Front

What is the reference angle for an angle in standard position?

Back

The reference angle is the acute angle formed by the terminal side of the angle and the x-axis. It is always positive and less than 90 degrees.

Front

What is the relationship between an angle and its reference angle?

Back

They add up to 180 degrees.

Front

Convert 180 degrees to radians.

Back

Front

Back

18 degrees.

Front

What is the formula to convert degrees to radians?

Back

Front

What is the formula to convert radians to degrees?

Back

Front

Find a coterminal angle to 45 degrees.

Back

405 degrees.

Front

What is the reference angle for 150 degrees?

Back

30 degrees.