Answer:
215 cm^2 (I'm sorry that it isn't an answer, but I assure you this answer is correct.)
Step-by-step explanation:
Multiply the side lengths of the rectangles together. The triangles are congruent so you can do the same thing to 1 of them.
5 x 13 = 65 (big rectangle)
5 x 13 = 65 (triangles)
5 x 12 = 60 (small rectangle)
5 x 5 = 25 (square)
65 + 65 + 60 + 25 = 215
Method two:
Everything has a width of 5, so add up the lengths and multiply by 5.
13 + 13 + 12 + 5 = 43
43 x 5 = 215
