You are making poster board boundary markers in the shape of square pyramids for a relay race. If you are including a ten -inch square as the bottom and you want the slant height to be twelve inches, how much poster board do you need?

Question

anonymous · Answer

There are four choices, since this is a multiple choice question.

        A) three hundred forty square inches
	B) three hundred sixty square inches
	C) three hundred eighty-four square inches
	D) four hundred square inches

campbell_st · Answer

Area of the square base is   A = 10^2

triangular face, base 10 height 12 
                                               
                                               A = 1/2 x 10 x 12

there are 4 faces... 

Hope this helps