Geometrymedium · Past Paper
In triangle ABC, angle A = 2x, angle B = 3x, and angle C = 5x. Find the value of angle C.
A18 degrees
B36 degrees
C54 degrees
D90 degrees
✓ Correct Answer: D — 90 degrees
2x + 3x + 5x = 180; 10x = 180; x = 18. Angle C = 5 * 18 = 90.
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