. The state of stress at a point is given by

\[ \sigma_{x}=-120 \mathrm{MPa}, \sigma_{\mathrm{y}}=180 \mathrm{MPa}, \sigma_{\mathrm{xy}}=80 \mathrm{MPa}(\mathrm{ccw}) \]

Draw the Mohr's circle the find the principal stress, principal planes and maximum shear stress. Show the results on stress element.