Question

T(6, 12) is the midpoint of CD The coordinates of D are (6, 15). What are the coordinates of C?

Answer 1

(6,9)

Explanation:

Let the coordinates of C be (x,y).

`(6+x)/(2)=6 \implies x=6 \\ \\ (15+y)/(2)=12 \implies y=15 \\ \\ \therefore C=(6,9)`