What is the area for the question

Answer:
552
Explanation:
20 x 20 = 400
4 X 20 = 80
400 + 80 = 480
the triangle is 6 tall.
move the other triangle on top of this triangle. to make a square.
which will get
12 × 6 which is 72
add 72 to 480 and you get 552
also, why is it mark geo?