Question

ABCD is a rectangle with B (-7,3), C (5,3), D (5,-8). How do you find the coordinates of A?

Answer 1

`A(-7, -8)`

Explanation:

The cyclic orderof the vertices is ABCD.

The side BC is along y = 3.

So, the parallel AD is along `y = y_D=-8`.

Likewise, CD is along x = 5.

So, the parallel BA is along `x = x_B=-7`.

BA and AD meet at `A(-7, -8)`.