Question

Three angles of a triangle are x - 30°, x - 45°, x + 15°, find the value of x. 
1. 60°
2. 40°
3. 80°
4. 100°

Answer 1

Correct Answer - Option 3 : 80°

Calculation:

The sum of all angle in triangle is 180^o

x – 30° + x – 45° + x + 15° = 180

⇒ 3x – 60 = 180

⇒ 3x = 240

⇒ x = 80

∴ The value of x is 80°