# A Scale Factor Equal to 1

An enlargement with a scale factor equal to 1 keeps the shape the same size.

The image is the same size as the object.

# A Real Example of a Scale Factor Equal to 1

The shape below has been enlarged by a scale factor of 2:

All lengths in the image are the same as the lengths in the object.

# More Real Examples of a Scale Factor Greater than 1

• The shape below has a scale factor of 1:

The scale factor can be found by dividing a length of the image by the corresponding length of the object.
scale factor = 3 ÷ 3 = 4.5 ÷ 4.5 = 1

• The shape below has a scale factor of 1:

The scale factor can be found by dividing the length of the image by the corresponding length of the object.
scale factor = 3 ÷ 3 = 5 ÷ 5 = 1
Geometry Lessons
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##### Note
WHAT IS A SCALE FACTOR?

The scale factor describes how much bigger (or smaller) the enlarged shape is compared to the original shape.

The scale factor multiplies each length of the shape.

For example, if the scale factor is 1, each side is multiplied by 1, meaning it does not get longer.

# OTHER TYPES OF SCALE FACTOR

If the scale factor is greater than 1, the enlarged shape gets bigger:

If the scale factor is less than 1, the enlarged shape gets smaller: