Scaled Copies Flashcard

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine how much larger or smaller a scaled copy is compared to the original.

Front

How do you find the scale factor between two similar shapes?

Back

To find the scale factor, divide the length of a side of the larger shape by the length of the corresponding side of the smaller shape.

Front

What is the scale factor going from the small diamond to the large diamond?

Back

1.5

Front

What is the scale factor from ΔABC to ΔDEF?

Back

2

Front

If the scale factor is 3, what does that mean for the dimensions of the shape?

Back

It means that each dimension of the shape is multiplied by 3, making the shape three times larger.

Front

What does it mean for two shapes to be similar?

Back

Two shapes are similar if they have the same shape but different sizes, meaning their corresponding angles are equal and their corresponding sides are in proportion.

Front

Line AB corresponds with what line in a scaled copy?

Back

XY

Front

Line CB corresponds with what line in a scaled copy?

Back

RQ

Front

What is the scale factor going from the small rectangle to the large rectangle?

Back

3

Front

If a shape is scaled down by a factor of 1/2, what happens to its area?

Back

The area is reduced to 1/4 of the original area because area scales by the square of the scale factor.