Core Scale Factors
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Core Scale factors
Part 1: Calculate the Scale Factors
Multiply every corresponding length by the same positive scale factor. Show your working.
Part 2: Check and Draw
New length ÷ original length = ________
New width ÷ original width = ________
Are the ratios matching? ______________________________
Answer Key
1. 12 cm and 8 cm.
2. 3 cm, 2 cm and 1 cm.
3. 5 m and 3.5 m.
4. 12 cm, 7.5 cm and 6 cm.
5. Scale factor 3; it enlarges the shape.
6. Every corresponding length becomes longer.
7. The 5 cm side was not scaled. The matching ratios are not all the same: 8 ÷ 4 = 2, 5 ÷ 5 = 1 and 12 ÷ 6 = 2.
8. New rectangle: 6 cm by 3.75 cm.
9. Both ratios should be 1.5, so they match.
10. The angles remain unchanged.
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