Question

11. The angles of a triangle are in the ratio
2:3:7. The measure of the smallest angle
is
(a) 90°
(b) 60°
(C) 30°
(b) 45°​

Answer 1

Correct answer:

C. 30°

Step-by-step explanation:

Let angles are 2x, 3x and 7x.

∠A+∠B+∠C=180∘

2x+3x+7x=180∘

12x=180∘

x=15∘

∴ Smallest angle is =2×15∘=30∘

Answer 2

Answer:

C.) 30°

Step-by-step explanation:

2x+3x+7x=180

12x=180

x=180/12

x=15

2x=2*15=30

3x=3*15=45

7x=7*15=105