In a ΔPQR, PQ = 10 cm, QR = 12 cm and semi perimeter is 17 cm. What is the length of PR ?
Answer & explanation
Correct answer: option 3
Semi perimeter = 17 cm
PQ = 10 cm
QR = 12 cm
Semi perimeter = \(\frac{PQ + QR + RP}{2}\)
17 = \(\frac{10 + 12 + RP}{2}\)
RP = 12 cm