Explain step byi'll give enough points!

1)
The distance between points A and B is;
, 
and if you wanted to you could measure out the legs of that hypotenuse using the slope between A and B, but I'm going to show you the easier way;
Δx = 4
Δy = -20
So from the midpoint, add 4 to the x-value and subract 20 from the y-value.
{(5+4),(-8-20)}
(9,-28) is the endpoint.

2)
Do the same thing as I did above;

So  is the distance.

Sorry for the delay, life delayed me a ton ,:D