(15, -8) :)
From C to midpoint you do (+10, -7), so you have to do that again to get to D
Answer:
cos (A+B+C)
Step-by-step explanation:
as A,B,C, are triangle we have A,B and C as 180
cost
Answer:

Step-by-step explanation:

The distance formula is sqare root (x-x)^2+(y-y)^2 and then you will plug in
sqrt(8+13)^2+(4+5)^2
plug that in to your calculator and that will be your answer what ever you get