CBSE Class 10 Maths (Basic) 2020 · Paper 430(B) · Question 37(b)
Prove that in a triangle, if the square of one side is equal to the sum of the squares of the other two sides, then the angle opposite to the first side is a right angle.
Answer
Since by SSS, . Hence the angle opposite the longest side is a right angle. (Converse of the Pythagoras theorem proved.)
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