If the answer is 90ft^2 and the base is 20 what is the height

In the diagram, the ratios of two pairs of corresponding sides are equal to prove that almn - axyz by the sas similarity theorem, it also needs to be shown that x 6 z un z zz un = 2x zləzz lezy

Which two undefined geometric terms always describe figures with no beginning or end?

Factor and solve to find roots x squared -x - 90 =0