Scale Factor

Front

What is the formula for scale factor?

Back

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.

Front

If a triangle has a scale factor of 2, how does its area change?

Back

The area of the triangle increases by a factor of 2^2 = 4.

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, and their corresponding angles are equal.

Front

If the scale factor from triangle ABC to triangle DEF is 3, what is the ratio of their perimeters?

Back

The ratio of their perimeters is also 3.

Front

If a rectangle measures 4 in by 7 in, what is the scale factor if a similar rectangle measures 8 in by 14 in?

Back

The scale factor is 2.

Front

What is the scale factor from a smaller quadrilateral to a larger quadrilateral if the scale factor is 4?

Back

The larger quadrilateral is 4 times the size of the smaller quadrilateral.

Front

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

Back

Divide the length of a side of the larger figure by the length of the corresponding side of the smaller figure.

Front

If a shape is enlarged by a scale factor of 1/2, what happens to its size?

Back

The shape is reduced to half its original size.

Front

What is the scale factor from a rectangle measuring 5 in by 10 in to a rectangle measuring 10 in by 20 in?

Back

The scale factor is 2.