With this question i don't know how to solve it
what are the coordinates of the endpoints of the midsegment for δdef that is parallel to de?
enter your answers, as a decimal or whole number, in the boxes.
and

The order pairs for the midsegment are (-1,3.5) and (-1,2).
 
You can find this points by finding the midpoint of the segments below:

Midpoint of FD: (-3+1/2, 3+7/2)              Midpoint of EF: (1+-3/2,-1+3/2)
                         (-2/2,7/2)                                                 (-2/2,4/2)
                         (-1,3.5)                                                    (-1,2)

You plot the two points on the coordinate plane, and the draw a line between the two point of these form the line is parallel to DE.