Question

Find the coordinates of the missing endpoint if B is the midpoint of AC. A(1,7),B(-3,1)

Answer 1

C(-7,-5)

Explanation:

b is the mid point of AC

the coordinate of A ( 1,7)

the coordinate of B (-3,1)

XB= (XA+XC)/2

-3 = (1+XC)/2

-6=1+XC

XC=-6-1 =-7

YB=(YA+YC) /2

1=(7+YC)/2

2=7+YC

YC=2-7

YC=-5

C(-7,-5)