Incorrect. $\displaystyle\angle{G}{K}{J}\usepackage{cmbright}\Huge\$ is a straight angle, so its measure is $\displaystyle{{180}}^{\circ}\usepackage{cmbright}\Huge\$ . Therefore, $\displaystyle{{50}}^{\circ}+{m}\angle{H}{K}{I}+{{42}}^{\circ}={{180}}^{\circ}\usepackage{cmbright}\Huge\$ . Solve this equation. The correct answer is 88.