Embedded Files
Learning Targets
I can describe some characteristics of a scaled copy.
I can tell whether or not a figure is a scaled copy of another figure.
Notes
Notes
What is a scaled copy of a figure? Let’s look at some examples.
The second and third drawings are both scaled copies of the original Y.
However, here, the second and third drawings are not scaled copies of the original W.
The second drawing is spread out (wider and shorter). The third drawing is squished in (narrower, but the same height).
We will learn more about what it means for one figure to be a scaled copy of another in upcoming lessons.
Vocabulary
Vocabulary
Scaled Copy: A scaled copy of a figure is a figure in which every length in the original figure is increased or decreased by the same scale factor. For example, if you draw a copy of a figure in which every length is enlarged by 2, then you have a scaled copy with a scale factor of 2.
Activities
Activities
1.1 Printing Portraits
1.1 Printing Portraits
Open the applet ⇨ ⇨ ⇨
Here is a portrait of a student. Move the slider under each image A-E, to see it change.
Look at Portraits A–E. How is each one the same as or different from the original portrait of the student?
Some of the Portraits A–E are scaled copies of the original portrait. Which ones do you think are scaled copies? Explain your reasoning.
What do you think “scaled copy” means?
1.2 Scaling F
1.2 Scaling F
On the TOP LEFT is the original drawing of the letter F. There are also several other drawings.
Identify all the drawings that are scaled copies of the original letter F. Explain how you know.
Examine all the scaled copies more closely, specifically the lengths of each part of the letter F. How do they compare to the original? What do you notice?
Summary
Summary
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