Answer:

Applying Pythagoras theorem in right-angled triangle POR,

????????² = ????????² + ????????²

????????² = 6² + 8²

=>36 + 64

=>100

???????? = √100

=>10 ????????

In ∆ PQR,

????????² + ????????² = 24² + 10²

=>576 + 100

=>676

????????² = 26²

=> 676

∴ ????????² + ????????² = ????????²

By applying Pythagoras theorem,

∆PQR is right-angled at P.