Enlargement and scale factor
Name: _____________________ Date: __________
Show your thinking with numbers, words, or a drawing.
1. This rectangle is enlarged by a scale factor of 3. How long is the image of the side marked 6 cm?
2. This rectangle is enlarged by a scale factor of 3. How long is the image of the side marked 4 cm?
3. This rectangle is enlarged by a scale factor of 3. How long is the image of the side marked 6 cm?
4. This rectangle is enlarged by a scale factor of 2. How long is the image of the side marked 6 cm?
5. This rectangle is enlarged by a scale factor of 2. How long is the image of the side marked 7 cm?
Answer key · Enlargement and scale factor
1. 18
A scale factor of 3 multiplies every length by 3.
6 × 3 = 18.
The image of that side is 18 cm.
2. 12
A scale factor of 3 multiplies every length by 3.
4 × 3 = 12.
The image of that side is 12 cm.
3. 18
A scale factor of 3 multiplies every length by 3.
6 × 3 = 18.
The image of that side is 18 cm.
4. 12
A scale factor of 2 multiplies every length by 2.
6 × 2 = 12.
The image of that side is 12 cm.
5. 14
A scale factor of 2 multiplies every length by 2.
7 × 2 = 14.
The image of that side is 14 cm.
Try it together
Choose a question from the printable. Use objects or a drawing to show your thinking, then explain your method to someone at home.