Flashcard: Coterminal and Reference Angles
Flashcard
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
+3
Standards-aligned
Wayground Content
FREE Resource
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15 questions
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1.
FLASHCARD QUESTION
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).
2.
FLASHCARD QUESTION
Front
How do you find a reference angle?
Back
A reference angle is the acute angle formed by the terminal side of an angle and the x-axis. To find it, subtract the angle from 180° (or π radians) if the angle is in the second quadrant, or subtract 360° (or 2π radians) if in the fourth quadrant.
3.
FLASHCARD QUESTION
Front
Back
Tags
CCSS.HSF.TF.C.9
4.
FLASHCARD QUESTION
Front
What is sin 45°?
Back
Tags
CCSS.HSG.SRT.C.6
5.
FLASHCARD QUESTION
Front
What can we say about the angle and the reference angle?
Back
They add up to 180 degrees.
6.
FLASHCARD QUESTION
Front
Back
Yes, they are coterminal angles.
7.
FLASHCARD QUESTION
Front
What is the reference angle for an angle of 138°?
Back
The reference angle is 42°.
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