The area of one of the triangles is 1/2 x 5.1 x 5.95 = 15.1725 square cm.
There are 4 triangles:
15.1725 x 4 = 60.69 square cm..
The area of the square bottom = 5.1 x 5.1 = 26.01 square cm.
Total area = 60.69 + 26.01 = 86.7
The answer is B.
