Question

Find x.
4 ft
2.4 ft
х
x =
ft

Answer 1

x = 3.2 ft

Explanation:

Using Pythagoras' identity in the right triangle.

The square on the hypotenuse is equal to the sum of the squares on the other 2 sides, that is

x² + 2.4² = 4²

x² + 5.76 = 16 ( subtract 5.76 from both sides )

x² = 10.24 ( take the square root of both sides )

x =
`√(10.24)` = 3.2