Question

Solve the length of the missing side?

Answer 1

a^2 + b^2 = c^2
a = 15. c = 20.
(15)^2 + b^2 = (20)^2
(15)^2 = 225. (20)^2 = 400
( 225 ) + b^2 = ( 400 )
( 400 ) - ( 225 ) = 175
b^2 = 175
sqrt. of b^2 = b. sqrt. of 175 = 13.23...
b = 13.23...