If p, q and r are the lengths (in cm) of the sides of a right-angled triangle, then (p - q – r)(q – r – p)(r – p - q) is always - CDS Elementary Mathematics 2024

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If p, q and r are the lengths (in cm) of the sides of a right-angled triangle, then (p – q – r)(q – r – p)(r – p – q) is always