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The law of cosines states that in any triangle, c2 = a2 + b2 - 2abcosy, where c is the hypotenuse, a and b are the legs, and y is the angle opposite c, the hypotenuse. Since in a right triangle, this is always 90 degrees, the cosine of y will always be 0. since 2ab(0) is 0, we get the formula a2 + b2 = c2, the Pythagorean Theorem.
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Earn +20 ptsQ: How do you prove pythagorean theorom?
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Who is Pythagorean Theorom?
Pyhthagoras was a guy who had a theorum!
What type of triangle proves the pythagorean theorerm?
The Pythagorean Theorem applies only to right triangles. (But they don't prove it.)
Does pythagorean theorem prove a triangle to be a right triangle?
Yes
How do you prove the hypotenuse leg theorem without using Pythagorean theorem?
I have to prove http://s5.tinypic.com/19ldma.jpg http://img22.imageshack.us/img22/9263/mathhlproofou4.jpg without using pythagorean theorem
What did Pythagoras do?
Pythagoras was a teacher, but he also was the first to prove Pythagorean math correct
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