4.1 Intro to Unit Circle Angles

Two angles that have the same initial and terminal sides are called ________.

• reference angles

• coterminal angles

• obtuse angles

• acute angles

To find coterminal angles you can repetitively add or subtract ______ degrees

• 90

• 180

• 270

• 360

True or False: Every angle has an infinite amount of coterminal angles.

• True

• False

True or False: 180 degrees and 360 degrees are coterminal angles

• True

• False

What quadrant is 375 degrees in?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

What quadrant is 1802 degrees in?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

What quadrant is -550 degrees in?

• Quadrant I

• Quadrant II

• Quadrant III

• Quadrant IV

A _____ is the number of degrees between the x-axis and the terminal side of an angle

• reference angle

• coterminal angle

• reflex angle

• straight angle

What is the reference angle for 125°?

• 235°

• 125°

• 75°

• 55°

What is the reference angle for -30°?

• 150°

• 30°

• 80°

• 60°