Geometrymedium · Past Paper
If an exterior angle of a triangle is 110 degrees and one of its opposite interior angles is 40 degrees, find the other opposite interior angle.
A40 degrees
B70 degrees
C110 degrees
D150 degrees
✓ Correct Answer: B — 70 degrees
Exterior angle = Sum of opposite interior angles. 110 = 40 + x; x = 70.
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