Chapter Test
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A 90^(∘) rotation about the origin will change the coordinates of the vertices such that (a,b)→ (- b,a).
To graph the polygon, let's plot the given vertices and then connect them.
When a figure is rotated 90^(∘) counterclockwise about the origin, the coordinates of the image's vertices will change in the following way.
| (a,b) | (- b,a) |
|---|---|
| J(-1,1) | J'(-1,-1) |
| K(3,3) | K'(-3,3) |
| L(4,-3) | L'(3,4) |
| M(0,-2) | M'(2,0) |
Finally, we can plot the image J'K'L'M'