Question

Triangle PQR is right angled at Q and QR = 5cm
i.If the area of the triangle PQR is 30cm² find the length of PQ
ii.Hence find the length of PR

Answer 1

Answer:

lenght of PQ = 12cm

length of PR = 13cm

Step-by-step explanation:

length of PQ:

area of triangle = ab/2

30cm² = 5a/2

60cm² =5a

a = 12cm

length of PR:

Pythagoras theorem applied

(PQ)² + (QR)² = (PR)²

(12)² + (5)² = (PR)²

144+25 = (PR)²

PR = √169

PR = 13cm

Please mark it as the brainliest......