Question

angle addition and subtraction
score: 0/2 penalty: none
question
solve for m∠cdf.
answer attempt 1 out of 2
m∠cdf = °

Explanation:

Step1: Identify angle - relationship

We know that the sum of the two adjacent angles $\angle CDE$ and $\angle EDF$ is $\angle CDF$. Given $\angle CDE = 66^{\circ}$ and $\angle EDF=104^{\circ}$.

Step2: Calculate $\angle CDF$

By the angle - addition postulate, $m\angle CDF=m\angle CDE + m\angle EDF$. So $m\angle CDF=66^{\circ}+ 104^{\circ}$.
$m\angle CDF = 170^{\circ}$

Answer:

$170$