Scale Factor & Scale Drawings Review (7.G.1)

Front

What is a scale factor?

Back

A scale factor is the ratio of the lengths of corresponding sides of two similar figures.

Front

How do you determine if two figures are scaled copies?

Back

Two figures are scaled copies if they have the same shape but different sizes, and their corresponding sides are proportional.

Front

What happens to the area of a shape when a scale factor of 3 is applied?

Back

The area increases by a factor of 9 (3 squared).

Front

If a shape has a perimeter of 10 units, what will its perimeter be if a scale factor of 2 is applied?

Back

The new perimeter will be 20 units.

Front

What is a scaled copy?

Back

A scaled copy is an image that has been stretched in ALL directions equally.

Front

If the scale factor is 5/4, how does it affect the dimensions of a shape?

Back

Each dimension of the shape is multiplied by 5/4.

Front

What remains constant in a scaled copy?

Back

All angles stay the same in a scaled copy.

Front

If a rectangle has dimensions 4 ft by 6 ft, what are the new dimensions if a scale factor of 3 is applied?

Back

The new dimensions will be 12 ft by 18 ft.

Front

What is the relationship between scale factor and perimeter?

Back

The perimeter of a shape is multiplied by the scale factor.

Front

If a scale factor of 1/2 is applied, what happens to the size of the shape?

Back

The shape is reduced to half its original size.