Resultant of three forces

Three forces in the $xy$-plane act on a point particle: $40\mathrm{N}$ at $0^{\circ }$, $30\mathrm{N}$ at $90^{\circ }$ and $20\mathrm{N}$ at $225^{\circ }$, with the angles measured counterclockwise from the positive $x$-semiaxis. Determine the magnitude and direction of the resultant.