1.

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

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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