CBSE Class 10 Maths (Standard) 2018 · Paper 30(B) · Question 24(b)
Prove that in a triangle, if the square of one side is equal to sum of the squares of the other two sides, the angle opposite the first side is a right angle.
Answer
Since (SSS) and , we have . Hence the angle opposite the first side is a right angle. Proved.
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