Posted by **Dwight** on Thursday, September 30, 2010 at 8:59pm.

The points A(1, -2, 4), B(3, 5, 7), C(4, 6, 8) are three of four vertices of parallelogram ABCD. Determine the coordinates of vertex D

Could someone please tell me to go about solving this question. Thanks a lot.

- Math -
**Bridgett**, Saturday, October 2, 2010 at 10:04am
D (5,7,9)

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