"Calculate the value of b in the triangle below." HELP PLZ WILL GIVE BRAINLIEST

We must first determine the shape of a rectangular prisms _ a0 to find area of the prism

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

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.