Stretching and Shrinking Flashcard 2

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. It is used to enlarge or reduce a shape.

Front

If a shape has a scale factor of 2, how does it affect the dimensions of the shape?

Back

Each dimension of the shape is multiplied by 2, making the shape twice as large.

Front

How does a scale factor of 3 affect the area of a shape?

Back

The area of the new shape is 9 times larger than the original area.

Front

What happens to the perimeter of a shape when the scale factor is 2?

Back

The new perimeter is 2 times larger than the original perimeter.

Front

If the original side lengths of a rectangle are 3 and 5, what are the new side lengths if the scale factor is 3?

Back

The new side lengths are 9 and 15.

Front

What is the relationship between scale factor and area?

Back

The area is scaled by the square of the scale factor.

Front

If a rectangle has a scale factor of 1, what happens to its size?

Back

The rectangle remains the same size; it is unchanged.

Front

What is the measure of side AD if it is given as 39?

Back

Side AD measures 39 units.

Front

How do you calculate the new area after applying a scale factor?

Back

Multiply the original area by the square of the scale factor.

Front

What is the scale factor from rectangle RSPQ to rectangle ABCD if the dimensions are tripled?

Back

The scale factor is 3.