Exploring Dilations
Did you pay attention in class?
Solve #20 using this setup:
Dilate ∆ABD by a scale factor of 2 with the center of dilation at the origin (0,0).
How do the side lengths of the ∆ABD compare to the side lengths of ∆A'B'D' ?
Compare the perimeters of the triangles.
(easy method: select the 
tool and click inside the polygon)
Create another shape and dilate it with a scale factor of k and center of dilation at C.
How do the side lengths compare ?
Compare the perimeters.
What effect does moving point C, the center of the dilation, have on the image ?
Directions:
>> Modify the dilation by changing the value of k. How do the side lengths compare ?
Create another shape and dilate it with a scale factor of k and center of dilation at C.
How do the coordinates compare?
(Use the 
tool to reveal the point labels.)
Assignment:
- Respond to each of the questions on this GeoGebra activity.
- Return to Google Classroom and use the link to complete "Scaling Machines"
- Practice this IXL skill:
Dilations and Scale Factors