Geometrymedium · Past Paper
If the three angles of a triangle are (x+10), (2x-20), and (x+30), find x.
A30
B40
C50
D60
✓ Correct Answer: B — 40
(x+10) + (2x-20) + (x+30) = 180; 4x + 20 = 180; 4x = 160; x = 40.
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