501 Geometry Questions

Look at the next figure where points B and G are rotated 90°clockwise. You
should notice how the following rule was observed in this rotation:

When preimage point B(x, y) is rotated 90 ̊ clockwisearound the origin,
the image point will be B'(y, –x).

Tranforming Polygons

You have seen a few examples of entire polygons undergoing transforma-
tions. To reflect, translate, or rotate an entire polygon, apply the appropri-
ate transformation rule to each individual coordinate pair in the polygon,
as was done to ΔKAY earlier in this chapter.

y

x

B (–2,4)

G^1 (–2,–5)

B^1 (4,2)

G (5,–2)

B (–2,4)

G^1 (–2,–5)

B^1 (4,2)

G (5,–2)

90°

90°

90° clockwise

501 Geometry Questions