M(6, 6) is the midpoint of mc139-1.jpg. The coordinates of S are (8, 9). What are the coordinates of R?

2 answers:

5 0

The midpoint is just the average of the endpoint coordinates.

(6,6)=((8+x)/2, (9+y)/2)

(12,12)=((8+x), (9+y))

(4,3)=(x,y)

So the coordinates of R are (4,3)

lorasvet [3.4K]3 years ago

5 0

Hello!

The formula for the midpoint is..

midpoint = ((x + x1)/2, (y + y1)/2)

Since M(6,6) is the mipoint, and S(8,9) is the endpoint... 

(6,6) = ((x + 8)/2, (y + 9)/2)

6 = (x + 8)/2
12 = x + 8
x = 4

6 = (y + 9)/2
12 = y + 9
y = 3

Hence, the coordinates of R is (4,3) in terms of (x,y) [A]

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kondaur [170]

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