Given that S is the midpoint of RT. and S(-4,-6) and T ( -7,-3) find the coordinates of R.

Given that S is the midpoint of RT. and S(-4,-6) and T ( -7,-3) find the coordinates of R.

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1 Answer

S(x,y) = {(Rx+Tx)/2, (Ry+Ty)/2}

So,

Sx = (Rx+Tx)/2

or -4 = (Rx -7)/2 => Rx = -8+7 = -1

Also,

Sy = (Ry+Ty)/2

or -6 = (Ry -3)/2 => Ry = -12+3 = -9

So the coordinates of R = ( -1,-9)
by Level 8 User (30.1k points)

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