JalynneG691676 JalynneG691676

Today at 5:43 PM
Mathematics

Answered

thevfigure below is a net for a triangular pyramid. if all triangles are equilateral what is the surface area of the pyramid

Answer :

KoralynB23128 KoralynB23128

Today at 5:47 PM

we have:

h each equilateral triangle = 7.79 ft

b each equilateral triangle = 9 ft

then area each equilateral trianle is:

[tex]A=\frac{1}{2}bh=\frac{1}{2}(9)(7.79)=\frac{1}{2}(70.11)=35.055[/tex]

and the pyramid have 4 equilateral triangles, therofore the surface area of the pyramid is:

[tex]A=4(35.055)=140.22[/tex]

answer: 140.22 ft2

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