

How do you find the coordinates of point C, if the midpoint of segment CD is point M (2.5, 6.5) and the coordinates of point D are (3, 5)?

I don't know if there is a formula or anything to find this, if there is I can't find it, but I kind of drew a graph and did a bit of guess-timation and ended up with D (2, 8). Did I do this right?

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Yes. You did.

X: 2.5 is .5 less than 3. You're halfway there. -.5 more is 2.
Y: 6.5 is 1.5 more than 5. You're halfway there. 1.5 more is 8.

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Thank you. Wasn't sure if I had done that right.
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