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A triangular pyramid has a slant height of .75 foot. The equilateral triangular base has a perimeter of 1.2 feet and an area of about .07 square foot. Find the approximate surface area.

Guest Mar 13, 2017
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So the figure is a tetrahedron?

 

surface area = (1/2)(perimeter of base)(slant height) + (area of the base)

surface area = (1/2)(1.2)(0.75) + 0.07

surface area = 0.45 + 0.07

surface area = 0.52 square feet

hectictar  Mar 13, 2017

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