What is the distance and midpoints of the points?
[1] (1,2) and (3,4)
[2] (3, 1) and (7,4)
the midpoint is the average of the endpoints.
The distance can be found using the "distance formula," (or the Pythagorean Theorem).
[1] (1,2) and (3,4)
midpoint: ((1+3)/2 , (2+4)/2) = (2,3)
distance: √((3-1)^2+(4-2)^2) = √(2^2+2^2) = √(4+4) = √8 = 2√2
Now you can do all similar problems using this as a model.