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If the ratio of the angles of a triangle is 3 : 5 : 7, find the value of the largest angle.A. 36°B. 60°C. 84°D. 15°1. B2. A3. C4. D |
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Answer» Correct Answer - Option 3 : C Given: The ratio of the angles of a triangle = 3 : 5 : 7 Concept used: The sum of the angles of the triangle is 180°. Calculation: Let the angles of the triangle be 3x, 5x, and 7x. Sum of the angles, 3x + 5x + 7x = 180 15x = 180 Or, x = 12 Value of the largest angle = 7x = 84° ∴ Largest angle is 84°. |
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