Similar Figures
Similar Figures have the same shape, but have a different size.
Their corresponding sides are proportional.
6 5
3
?
You can find the missing side of a similar figure by setting up a proportion.
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You can use similar figures to find the height of really tall objects by using proportions.
Here are two bike tracks. One is the adult size, and one is for kids. How long is the adult size straightaway?
? 550 ft. 390 ft. 200 ft.
• Similar Figures have a scale factor.
30 ft. 20 ft. 15 ft. 10 ft.
These figures have a scale factor of 2:1, or 1:2.