SOLUTION: find the coordinates of the missing endpoint given the E is the midpoint of DF 1.F (5,8),E(4,3) 2.F(2,9),E(-1,6) 3.D(-3,-8),E(1,-2) plz i rely cant find out how to do

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Question 345592: find the coordinates of the missing endpoint given the E is the midpoint of DF
1.F (5,8),E(4,3)
2.F(2,9),E(-1,6)
3.D(-3,-8),E(1,-2)
plz i rely cant find out how to do these and im home sick so i cant get help from teacher.
Found 2 solutions by Fombitz, solver91311:
Answer by Fombitz(32388)   (Show Source): You can put this solution on YOUR website!
Use the midpoint formula,



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Complete the calculation to solve the problem.
Use the highlighted formula for all of the problems.
Plug in the values you know, solve for the unknown values.
Answer by solver91311(24713)   (Show Source): You can put this solution on YOUR website!


Use the midpoint formulas:

and



where and are the coordinates of the given points. In your case, you are given one of the points and the coordinates of the midpoint, so you will substitute values for and that you get from point F or D and for and that you get from point E. Then solve the equation for and to get the values for the coordinates for either D or F as the case may be.

John

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