Answer:
75°
Explanation:
Let their common multiple be 'x'
Thus, the 3 angles are 11x, 15x, 10x
We know, the sum of all angles of a triangle is 180°
∴ 11x + 15x + 10x = 180°
∴ 36x = 180°
∴ x = 5
The largest angle, 15x = 15 × 5 = 75°
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