Answered

27. Given R(5, 2), S(a, -2) and T(-3, b). Find a and b so that S is the midpoint of .

Sagot :

Midpoint = S (a, -2)       Point R (5,2)       Point T (-3,b)

Solve for a:
a = Xr + Xt
        2
a = 5 + -3
         2
a = 2/2
a = 1

Solve for b:
-2 = Yr + Yt
           2
-2 = 2 + b
         2
2 + b = 2 (-2)
b = -4 -6
b = -6

a = 1,  b = -6