Extra Credit- IM Unit 1 Review

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 figure.

Front

If a rectangle's length is increased by a scale factor of 4, what happens to its length?

Back

The length of the rectangle becomes 4 times its original length.

Front

What does a scale factor of 1:3 indicate?

Back

It indicates that the new image is 3 times larger than the original image.

Front

What is the scale factor if a smaller triangle is resized to a bigger triangle and the dimensions are given?

Back

The scale factor is the ratio of the corresponding sides of the two triangles.

Front

How do you find the scale factor when reducing a shape?

Back

Divide the new dimension by the original dimension.

Front

If a rectangle with a side of 20 cm is reduced to 5 cm, what is the scale factor?

Back

The scale factor is 1/4.

Front

What happens to a figure when the scale factor is greater than 1?

Back

The figure is enlarged.

Front

What happens to a figure when the scale factor is less than 1?

Back

The figure is reduced.

Front

If the scale factor is 1.75, how do you find the new dimensions of a figure?

Back

Multiply the original dimensions by 1.75.

Front

What is the relationship between the original and new area when the scale factor is known?

Back

The area of the new figure is the area of the original figure multiplied by the square of the scale factor.