Question

What is the length of the third side of the window frame below? (Figure is not drawn to scale.)

Answer 1

You can solve this using the Pythagorean theorem which states that the square of the length of the hypotenuse is the sum of the square of the lengths of the two legs. In equation form:
c2 = a2 + b2
If the third side is b,
b2 = c2 - a2
b = sqrt(c2 - a2)

Using the given values:
b = sqrt (65^2 - 60^2)
b = 25 in