Kind of easy giving alot points to anyone who knows​

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'

The first side of a triangle measures 5 in less than the second side, the third side is 3 in more than the first side, and the perimeter is 17 in. how long is the third side? if s represents the length of the second side, which of the following represents the length of the third side? s-5 ws-2 s+ 3 next question ask for turn it in

Use the squared identities to simplify sin^2x cos^2x