## Elementary Geometry for College Students (7th Edition) Clone

measure of arc $DF=104^{\circ}$
Since $\overline{EF}$ is a diameter, the measure of arc $EDF=180^{\circ}$. From part a we know the measure of arc $DE=76^{\circ}$. Subtracting... $180-76=104$ measure of arc $DF=104^{\circ}$