SOLUTION: How do I get the surface area of a regular tetrahedron with edge length 5cm?

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Question 1142672: How do I get the surface area of a regular tetrahedron with edge length 5cm?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
+A%5Bf%5D+=+sqrt%283%29%2A%28a%2F2%29%5E2+ = area of a face where +a+=+5+ cm
+A%5Bf%5D+=+%28+sqrt%283%29%2F4+%29%2A5%5E2+
+A%5Bt%5D+=+4%2A%281%2F4%29%2Asqrt%283%29%2A25+
+A%5Bt%5D+=+25%2Asqrt%283%29+ cm2 = area of tetrahedron
check the math