
Reference Angles
Flashcard
•
Mathematics
•
12th Grade
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is a reference angle?
Back
A reference angle is the acute angle formed by the terminal side of an angle in standard position and the x-axis.
2.
FLASHCARD QUESTION
Front
How do you find the reference angle for an angle in standard position?
Back
To find the reference angle, subtract the angle from 180° if it's in the second quadrant, subtract 180° from the angle if it's in the third quadrant, or subtract the angle from 360° if it's in the fourth quadrant.
3.
FLASHCARD QUESTION
Front
What is the reference angle for 125°?
Back
55°
4.
FLASHCARD QUESTION
Front
What is the reference angle for -30°?
Back
30°
5.
FLASHCARD QUESTION
Front
What is the reference angle for -310°?
Back
50°
6.
FLASHCARD QUESTION
Front
What is the reference angle for 240°?
Back
240° - 180° = 60°.
7.
FLASHCARD QUESTION
Front
What is the reference angle for 450°?
Back
450° - 360° = 90°.
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