Respuesta :
I think it is D because the triangle is about 12 to 13 and the square below is about 12 too.
area for triangle = 1/2 x h x b
so 1 triangle = 1/2 x 5.12 x 3.23 = 8.2688 since the triangles are congruent they are equal so 8.2688 x 2 = 16.5376
round that up to 17
Answer is C 17 square inches