Correct. The sum of the three angles is $\displaystyle{{180}}^{\circ}\usepackage{cmbright}\Huge\$ . So the measure of the third angle is the solution to:

$\displaystyle{{56}}^{\circ}+{{63}}^{\circ}+{{x}}^{\circ}={{180}}^{\circ}\usepackage{cmbright}\Huge\$ or $\displaystyle{{119}}^{\circ}+{{x}}^{\circ}={{180}}^{\circ}\usepackage{cmbright}\Huge\$

So $\displaystyle{{x}}^{\circ}={{180}}^{\circ}-{{119}}^{\circ}={{61}}^{\circ}\usepackage{cmbright}\Huge\$ .

The third angle measures 61 degrees.