Question

Find the surface area of a square pyramid that has a base of 2 feet and a slant height of 2.5.

Answer 1

I think I did this correct and the answer in the lesson is wrong. Here's my calculation.

Surface Area=LA+B
Lateral Area=1/2Perimeter*slant height
LA=1/2 (8)*(2.5)
LA=4*2.5
LA=10
Surface Area=LA+B
Surface Area=10+8
Surface area=18