Scale factor is the ratio of change between
• Scale factor is the ratio of change between two sides. The number you multiply by to relate the first shape to the second is the scale factor.
If a shape becomes twice as big, the scale factor would be two. If a shape shrinks to half its size, the scale factor is ½. Let’s take a look.
Now Take Look a lookatatthe the. BLUE RED shape, translation write and down the write down and the base and height…
did and 4 x 2 = 8 5 et? yo ug How many times bigger is 2 is your scale factor thebecause blue shape? 5 x 2 = 10 ha t 10 W 4 8
6 9 2 3 For 6 to become 2, you must Both 6 and 9 reduce multiply by 1/3 and forin 9 size to Now take a look at the by dividing 3 BUT become 3 you must scale also transformation, what has been factor must be So a relation multiply by 1/3. your by themultiplying. amount of reduction? scale factor is…. 1/3
2 3 8 12 Both anda 3 look are multiplied by 4. Now 2 take at the This means the scale is transformation, what factor has been 4. the amount of enlargement?
What is the scale factor? 5 15 7 21 A B 3 1/3 C 5 D 10
What is the scale factor? 8 A 3 16 B 2 C D 1/2 8
What is the scale factor? 4 12 A 3 B C D 1/2 1/3 9
What is the scale factor? 3 18 A 9 B 4 C D 1/6 6
A Mustang GT is 16 feet long. A model of it was built with a scale of 1 in : 2 ft. How long is the model. A 9 in B 16 ft C 16 in D 8 in
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