Question

The angles of a triangle are in ratio 2:7:11. The angles are
(a) (20°,70°, 90°)
(b) (30°,70°,80°)
(C) (18°,63°,999)
(d) none of these​

Answer 1

Answer:

1st angle = 2x = 18 degrees

2nd angle = 7x = 63 degrees

3rd angle = 11x = 99 degrees

Step-by-step explanation:

Ratio = 2 : 7 : 11

Sum of angles in a triangle = 180

= 2x + 7x + 11x = 180

= 20x = 180

= x = 9

1st angle = 2x = 18 degrees

2nd angle = 7x = 63 degrees

3rd angle = 11x = 99 degrees