SOLUTION: Find the surface area of each pyramid to the nearest whole number? 11in. = slant height 12in. = perimeter

Algebra ->  Surface-area -> SOLUTION: Find the surface area of each pyramid to the nearest whole number? 11in. = slant height 12in. = perimeter      Log On


   

Question 115877: Find the surface area of each pyramid to the nearest whole number?
11in. = slant height
12in. = perimeter
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
what you have is 4 triangles with:
base=12/4=3in. & a height of 11in.
thus the area equation of the tringle is:
1/2Bh 1/2*3*11=33/2 sqin.
seeing as there are 4 sides then the surface area is:
4*1/2*3*11=66in.^3.