Question

Triangle PQR is right-angled at vertex R
Calculate QR if P Q = 15 cm and PR 12 cm​

Answer 1

∆PQR right angled at R and PQ = 34 cm, QR = 33.6 cm.

To find: Length of PR.

According to Pythagoras Theorem,

PR2 + QR2 = PQ2

PR2 + 33.62 = 342

PR2 + 1128.96 = 1156

PR2 = 1156 - 1128.96

∴ PR = √27.04 = 5.2 cm

Hope it helps uh..!!

Answer 2

Answer:

QR= 9cm

Step-by-step explanation:

We can use the Pythagorean theorem or the Pythagorean triplet method.

3, 4, 5 are the most common Pythagorean triplets.

3 × 3= 9

4 × 3= 12

5 × 3= 15

Therefore, QR= 9cm