standard_description: Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve simple equations for an unknown angle in a figure.
problem_activity: Line
$$AC$$
intersects line
$$EB$$
at point
$$F$$
. Ray
$$FD$$
extends from point
$$F$$
. Determine the measures of
$$\angle EFD$$
and
$$\angle CFD$$
.
[IMG]


aligns: yes