Mandy needs to paint all the faces and the base of a model pyramid she made for her history project. The dimensions of the pyramid are shown here. What is the total surface area of the pyramid?
A square pyramid is shown. The side of the square is 10 inches. The height of the triangular faces is 9 inches.
A. 190 in2
B. 280 in2
C. 380 in2
D. 460 in2
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