Grade 9 Reference Angle Worksheet
This worksheet focuses on understanding and calculating reference angles for various angles in standard position, aligning with Grade 9 trigonometry standards.
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Grade 9 Reference Angle Worksheet
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Read each question carefully and provide the best answer. Remember that a reference angle is the acute angle formed by the terminal side of an angle and the x-axis.
1. A reference angle is always a(n) angle.
2. The reference angle for 150° is .
3. The reference angle for an angle in the third quadrant is calculated by subtracting 180° from the angle.
1. What is the reference angle for 240°?
30°
60°
90°
120°
2. An angle of 315° is in which quadrant?
Quadrant I
Quadrant II
Quadrant III
Quadrant IV
1. Draw an angle of 135° in standard position on the coordinate plane below and label its reference angle.
2. Determine the reference angle for -210°.
1. The reference angle for 95° is 85°.
True
False
2. An angle of 400° has the same reference angle as 40°.
True
False