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Triangle Angle Sum and Exterior Angle Theorem
Worksheet
Grade Level
Grade 8
8.127 Triangle Angle Sum and Exterior Angle Theorem
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In triangle QRS, the exterior angle at S is 3 times angle R. If angle Q is 34 degrees, which choice is angle R?
A
15 degrees
B
17 degrees
C
19 degrees
D
21 degrees
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