The net of a square pyramid is shown below. What is the total surface area of the square pyramid in square meters?

A= 432 m 2

B= 756 m 2

C= 504 m2

D= 864 m 2

0.02040816326

geometry: triangles

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call the larger triangle abc

then the smaller triangle cde is similar to abc (all angles are equal, aaa).  

ab is the side that is 36, and we wish to find de, the side corresponding to ab

area_cde = area_abc - area_cde --> area_abc / area_cde = 2

let x=length of de

ratio of areas = (ratio of sides)^2

+2+=+%2836%2fx%29%5e2+

+2+=+1296%2fx%5e2+

++x%5e2+=+1296%2f2+=+648+

25.45584

i think the answer is d im not sure