Question

In ΔPQR PQ=√8 QR=√5 PR=√3.Is ΔPQR a right angled triangle? If yes, which angle is of 90°?

Answer 1

PQ^2 = QR^2 + PR^2 ....
=> triangle PQR is a right angle triangle ...
Right angled at R..

Answer 2

Yes. It is right angled triangle because it satisfies Pythagorean triple theorem.
Pr^2+qr^2 = pq^2.
3+5=8.
And the right angle is opposite to longest side ie pq.
There fore Right angle is angle prq.
Cheers