#### Answer

measure of arc $DF=104^{\circ}$

#### Work Step by Step

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 $DF=104^{\circ}$