Question

Find x in this right triangle

Answer 1

Since the triangle is right angled, we may use pythagoras theorem to find the third side.

Pythagoras theorem :-

KI^2 + JI^2 = KJ^2

substituting the known values in the formula,

x^2 + 3^2 = 5^2

x^2 + 9 = 25

x^2 = 25 - 9

x^2 = 16

x = √16

x = 4

______________________

•°• value of x is 4cm