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ACCUPLACER
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Triangle Angle Properties
Grade Level
ACCUPLACER
AAF.160 Triangle Angle Properties
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In triangle ABC, m∠A = (x + 20)° and m∠B = (2x − 10)°. The exterior angle at C is twice m∠A. What is m∠C?
A
50°
B
80°
C
30°
D
100°
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