An angle r and it's complement are in the ratio 2: 7.what is measure in degrees of angle r?

Step-by-step explanation:

Two angles are said to be complementary if they sum up to be .

Their ratio is given to be 2: 7 , that is

2x + 7x = 90

9x = 90

x = 10 Therefore : the measure of R is 2x , which is 2 x 10 =

circle area = pi * radius^2

if diameter = 10 then radius = 5

circle area = pi * 5^2

circle area = pi * 25

circle area = 78.5398163397 square units

step-by-step explanation:

substitute,

circle 1 = 5

circle 2 = 20

circle 3 = 44

in this case no matter how you add, you will always get a perfect square..

hence proved

happy to

pls mark as brainliest