Find the total number of unit cubes that fill the entire prism

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

Which is a true statement about an exterior angle of a triangle a. it is formed by two segments that are not sides of the triangle, b. it forms a linear pair with one of the interior angles of the triangle, c. it is complementary to one of the interior angles of the triangle. d. it is formed by two segments that are sides of the triangle.

Can someone me i’m confused. will give brainliest and a whole bunch of points