Question

How do I find for x

Answer 1

The triangle is a right triangle, so the Pythagorean theorem applies.

It says, for this triangle,

`14.7^2=11.9^2+x^2`

Solve for
`x`; you'll find

`x^2=14.7^2-11.9^2`

`x=\pm√(14.7^2-11.9^2)`

(but you omit the negative square root, since
`x` must be a positive length)

Use a calculator to find an approximate value:

`x=√(14.7^2-11.9^2)\approx8.64`

(measured in km)