Question

Midpoint CD is E(-1,0). One endpoint is C(5,2). What are other endpoint coordinates?

Answer 1

(- 7, - 2 )

Explanation:

let the coordinates of the endpoint = (x, y ), then

Using the midpoint formula

0.5(5 + x) = - 1 ( multiply both sides by 2 )

5 + x = - 2 ( subtract 5 from both sides )

x = - 7

0.5(2 + y) = 0 ( multiply both sides by 2 )

2 + y = 0 ( subtract 2 from both sides )

y = - 2

The coordinates of the other endpoint are (- 7, - 2 )