I'm not sure how to proceed with this one. Prove the converse of Pythagoras theorem.
Let T be a triangle with sides a,b and c and c is the longest side and c^2 = a^2 + b^2 then T is a right-angled triangle.

Question

I'm not sure how to proceed with this one. Prove the converse of Pythagoras theorem. 
Let T be a triangle with sides a,b and c and c is the longest side and c^2 = a^2 + b^2 then T is a right-angled triangle.

welshfella · Answer

I can prove it using the law of cosines  but is that justified?

welshfella · Answer

I have to go.  Be back in about 30 minutes.

ganeshie8 · Answer

Hey

welshfella · Answer

Hi

phi · Answer

There is probably nicer approach (there always is), but we could drop a perpendicular to form a right angle with the hypotenuse "c"
Also, I assume we can use Pythagoras
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