Coterminal and Reference Angles in Radians

What are co-terminal angles?

• angles that share the same terminal side

• angles that are supplementary

• angles that are complimentary

• angles that are opposite each other

What is a reference angle?

• angles measuring more than 180 degrees

• co-terminal with another angle

• an angle measured in degrees

• Acute, positive angle formed with terminal side and x axis

Which of the following angles are coterminal to the angle -\frac{3\pi}{4} ? Select all that apply.

Which of the following angles are coterminal to the angle -\frac{3\pi}{4} ? Select all that apply.

• Yes

• No

Given the angle in standard position, which image shows the corresponding reference angle?

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Given the angle in standard position, which image shows the corresponding reference angle?

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What are co-terminal angles?

• angles that share the same terminal side

• angles that are supplementary

• angles that are complimentary

• angles that are opposite each other