Question

what is the measure of ∠dcf? the measure of ∠dcf is degrees.

Explanation:

Step1: Identify angle - addition principle

The measure of $\angle DCF$ is the sum of the measures of $\angle DCE$ and $\angle ECF$.

Step2: Add the given angle measures

$\angle DCE = 75^{\circ}$ and $\angle ECF=64^{\circ}$, so $\angle DCF=75^{\circ}+ 64^{\circ}$.
$75 + 64=139$

Answer:

$139$