Question

Find the length of the missing side

Answer 1

Use the Pythagorean theorem:

`x^2+11^2=18^2\\\\x^2+121=324\ \ \ \ |-121\\\\x^2=203\to \boxed{x=√(203)\ m}`

Answer 2

It is a right angles triangle here.

So by using pythagoras theorem here;

unknown side length will be=
`√(18^2 -11^2 )`=
`√(324-121)`=
`√(203)` cm (Answer)