GeoGebra Classroom

# Rotations in the Coordinate Plane APS

1) Plot the points (type the ordered pair into the input bar, bottom of the page) 2) A(-4,2), B (-2,1) and C (-3, 3) 3) Use the polygon tool to construct the triangle ABC 4) Plot D (0,0) 5) Use the rotate around point tool (9th tool over, under the reflection diagram) 6) Select point D and then click on the center of Triangle ABC 7) Pop up Type in 90
When you're done (or if you're unsure of something), feel free to check by watching the quick silent screencast below the applet.

## Video (silent video)

What are the coordinates of A'B'C'?

## 2.

1) Plot the points (type the ordered pair into the input bar, bottom of the page) 2)A(-5,-2), B (-3,-1) and C (-2, -3) 3)Use the polygon tool to construct the triangle ABC 4)Plot D (0,0) 5)Use the rotate around point tool (9th tool over, under the reflection diagram) 6) Select point D and then click on the center of Triangle ABC 7) Pop up Type in 180

List the points of A"B" and C"

If a Triangle is in quadrant 2, and we rotated the pre-image 90 degrees which quadrant would its image be in?

Select all that apply
• A
• B
• C
• D