If we want to find the height of an object like a flagpole, we can use (fill in the blank) triangles. In the graphic above, triangle ABE is similar to triangle ACD. In the graphic line segment DC is the height of the (fill in the blank). Using the length of BE (your height), AB (your shadow), and AC (shadow of flagpole), we can use a proportion to determine the height of the (fill in the blank). I really dont understand this question