Question
Thu August 21, 2008 By:

abc is isoscelles triangle,ac=bc.if ab*ab=2(ac*ac), prove that abc is right triangle?

Expert Reply
Thu August 21, 2008

It is given that ab*ab = 2(ac*ac)

ab*ab = (ac*ac) + (ac*ac)

ab*ab = (ac*ac) + (bc*bc)                        (since, ac = bc)

Thus, ABC is a right angled triangle.     (by pythagoras theorem)

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