Question

The measure of two angles are in the ratio 7:8 and they are supplementary angles . What are their measure in degrees?

Answer 1

Let 7x = small angle 
let 8x = big angle 
7x + 8x = 180 
15x = 180 
x = 180/15 
x = 12 
Small angle = 7(12) = 84 
Big angle = 8(12) = 96 

Answer 2

7:8,

Let First Angle Be 7x

Let Second Angle Be 8x

7x+8x= '180'--> (Supplementary Angle)

15x= 180

x = 12

∴ First No. = 7(12) = 84

  Second No. = 8(12) = 96