standard_description: Understand that, unlike multiplication of numbers, matrix multiplication for square matrices is not a commutative operation, but still satisfies the associative and distributive properties.
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: no