In rectangle abcd, if the coordinates of a are (0, 0) and of c are (r, s), find the coordinates of b.

ANSWER

B(r,0)

or

B(0,s)

EXPLANATION

In rectangle ABCD, the coordinates of A are (0, 0) and of C are (r, s).

When we name the triangle in a clockwise direction.

Then B must bear the y-coordinate of A and bear the x-coordinate of C.

This gives us (r,0)

When we name the triangle in an anticlockwise direction.

Then B must bear the x-coordinate of A and bear the y-coordinate of C.

This gives us (0,s)