Question

12. A pair of complementary angles is in the ratio of 7:2, find them.​

Answer 1

Answer:

Let two angles be 7x and 2x

7x + 2x = 90 °

9x = 90°

x = 10

Therefore, two angles are

7x = 7 × 10 = 70°

2x = 2 × 10 = 20°

Answer 2

Ratio of complementary angles = 7:2 [given]
Solution:- let the angles as 1 and 2
According to the given ratio
Angle 1 = 7x
Angle 2 = 2x

We know that the sim of complementary angles is always 90 degrees.

According to question :-
7x + 2x = 90
9x = 90
x = 90/9
x = 10

Then ,
Angle 1 = 7x = 7 x 10 = 70 degree
Angle 2 = 2x = 2 x 10 = 20 degree

Hence , solved.

Hope it will be very helpful for you.
Thank u