Angles in the Coordinate Plane

Front

What are coterminal angles?

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°.

Front

How do you find a positive coterminal angle for a given angle?

Back

To find a positive coterminal angle, add 360° to the given angle until the result is positive.

Front

How do you find a negative coterminal angle for a given angle?

Back

To find a negative coterminal angle, subtract 360° from the given angle until the result is negative.

Front

What is the terminal side of an angle?

Back

The terminal side of an angle is the position of the angle after it has been rotated from the initial side.

Front

In which quadrant does a 120° angle lie?

Back

A 120° angle lies in Quadrant II.

Front

In which quadrant does a 330° angle lie?

Back

A 330° angle lies in Quadrant IV.

Front

What is the standard position of an angle?

Back

An angle is in standard position when its initial side is along the positive x-axis.

Front

What is the reference angle for an angle in Quadrant II?

Back

The reference angle for an angle in Quadrant II is found by subtracting the angle from 180°.

Front

What is the reference angle for an angle in Quadrant III?

Back

The reference angle for an angle in Quadrant III is found by subtracting 180° from the angle.

Front

What is the reference angle for an angle in Quadrant IV?

Back

The reference angle for an angle in Quadrant IV is found by subtracting the angle from 360°.