Question

if the two complementary angles are in ratio of 7:2 then find the angles

Answer 1

Given that the ratio of two complementary angles is 7 : 2

Now complementary angles sum up to 90 degrees

Let the angles be 7x and 2x

7x + 2x = 90

9x = 90

x = 90 / 9

x = 10

7x = 7 × 10 = 70

2x = 2 × 10 = 20

So the two angles are 70 and 20 degrees.

Hope it helps you :-)

Answer 2

let the anglec measure is x
then first angle is 7x and second one is 2x
atq...................................    7x+2x=90      {sum of complementary angles is 90°}
                                             9x=90
                                             x=10
then first angle is 7×10=70°
then second one is 2×10=20°