What is a scale factor?
7.3.2.2 Scale Factor

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•
Mathematics
•
5th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
A scale factor is a number that scales, or multiplies, a quantity. It is used to determine how much larger or smaller a figure is compared to another figure.
2.
FLASHCARD QUESTION
Front
If triangle ABC is similar to triangle XYZ, what does that mean?
Back
It means that the corresponding angles of the triangles are equal and the lengths of corresponding sides are proportional.
3.
FLASHCARD QUESTION
Front
How do you find the scale factor between two similar figures?
Back
To find the scale factor, divide the length of a side of one figure by the length of the corresponding side of the other figure.
4.
FLASHCARD QUESTION
Front
What is the scale factor from a triangle with sides 2, 3, and 4 to a triangle with sides 4, 6, and 8?
Back
The scale factor is 2, since each side of the second triangle is twice the length of the corresponding side of the first triangle.
5.
FLASHCARD QUESTION
Front
If the scale factor is 3/4, what does that mean for the size of the figure?
Back
It means the new figure is 3/4 the size of the original figure.
6.
FLASHCARD QUESTION
Front
What is the scale factor from a large triangle to a small triangle if the sides are 6 and 4?
Back
The scale factor is 2/3, since 4 divided by 6 equals 2/3.
7.
FLASHCARD QUESTION
Front
If a television has a length of 50 inches and a similar television has a length of 108 inches, what is the scale factor?
Back
The scale factor is 108/50 or 2.16.
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