Question

The answer is in the picture attached but could somebody pls tell me how to get that answer, thanks!

Answer 1

Hi,

Explanation:

The big red triangle has an area of S/4

The medium red triangle has an area of S/16

The smallest red triangle has an area of S/64

`(S)/(4) +(S)/(16) +(S)/(64) \\\\=(16S)/(64) +(4S)/(64) +(S)/(64) \\\\=(21*S)/(64) \\\\ratio=((21*S)/(64))/(S)=(21)/(64) =(a)/(b) \\`

a=21 and b=64