Scale Factor

Front

What is a scale factor?

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.

Front

If the scale factor is greater than 1, what does that indicate about the size of the copy?

Back

The copy is larger than the original figure.

Front

If the scale factor is less than 1, what does that indicate about the size of the copy?

Back

The copy is smaller than the original figure.

Front

What does it mean for two figures to be scaled copies of each other?

Back

It means that one figure can be obtained from the other by multiplying all dimensions by the same scale factor.

Front

How do you determine if two figures are similar?

Back

Two figures are similar if their corresponding angles are equal and the lengths of their corresponding sides are proportional.

Front

What is the scale factor from a triangle with side lengths 3, 4, 5 to a triangle with side lengths 6, 8, 10?

Back

The scale factor is 2.

Front

If Figure A has a scale factor of 1/3 to Figure B, what can you say about their sizes?

Back

Figure A is one-third the size of Figure B.

Front

What is the corresponding side length of a triangle with side length 10 if the scale factor to a smaller triangle is 1/2?

Back

The corresponding side length is 5.

Front

In a scale drawing, if the scale factor is 1:100, how many centimeters on the drawing represent 1 meter in real life?

Back

1 centimeter on the drawing represents 1 meter in real life.

Front

What is the relationship between the scale factor and the area of similar figures?

Back

The area of similar figures is proportional to the square of the scale factor.