Proof for Area of Equilateral Triangle
A Math Proof
Video showing the proof of a way to find the area of an equilateral triangle which is not the common way. This is an original proof, not usually shown in textbooks.
Credit: www.geometry-help.info
Copyright: 2007 geometry-help.info
Published by Tango
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3 Comments
Post a CommentThanks! this was really helpfull.. Keep it up :)
very amazing but increase the volume
The Proof for Area of Equilateral Triangle over complicates.
Try this:
The half of the base lenghth is a/2.
Tan 60 = h/a/2
h = a.Tan 60/2
Tan 60 = 3^1/2
Area = a/2 * a Tan 60/2
Therefore area = (a^2 . 3^1/2)/2*2