IM 7.1.1 Lesson: What are Scaled Copies?
Here is a portrait of a student. Move the slider under each image, A–E, to see it change.
After using the app above, how is each one the same as or different from the original portrait of the student?
Some of the sliders in the app above make scaled copies of the original portrait. Which ones do you think are scaled copies? Explain your reasoning
Based on the previous questions, what do you think “scaled copy” means?
Here is an original drawing of the letter F and some other drawings.
Identify all the drawings that are scaled copies of the original letter F drawing. Explain how you know.
Examine all the scaled copies from the previous image more closely, specifically, the lengths of each part of the letter F. How do they compare to the original? What do you notice?
On the grid, draw a different scaled copy of the original letter F.
Your teacher will give you a set of cards that have polygons drawn on a grid. Mix up the cards and place them all face up. Take turns with your partner to match a pair of polygons that are scaled copies of one another.
When you agree on all of the matches, check your answers with the answer key. If there are any errors, discuss why and revise your matches.