Question

In right triangle PQR where R is the right angle, PQ=13, QR=12, what is the length of PR ?

Answer 1

sqrt(13^2-12^2)

Answer 2

5

Answer 3

if u draw the diagram, you will find that PQ is the hypotenuse of the right angled triangle PQR.

By Pythagoras Theorem,
H² = P² + B²
means
PQ² = PR² + QR²
13² = PR² + 12²
169 = PR² + 144
169-144 = PR²
25 = PR²
PR = root(25)
PR = 5