The midpoint of AB is (1, 2). The coordinates of A are (-3,6).Find the coordinates of B.

Midpoint has coordinates which equal to,

We know the coordinates of a midpoint as well as the coordinates of so we should be able to find coordinates of .

First solve both equations for and respectively,

Now insert the data,

The coordinates of B are therefore .

Hope this helps :)

6 (3) - 4 + 32

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