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In the △PQR, PQ = 39 in, PR = 17 in, and the altitude PN = 15 in. Find QR.

can u guys show how to solve the problem(plz include answer)

i got 42

by using the pythagorean theorem i am not sure if i am correct but can u check it

2 answers

PN^2 = 17^2-15^2 = 64
PN = 8

So, NQ = 39-8 = 31

QR^2 = 31^2+15^2 = 1186
QR = 34.438

PR=17cm

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