Dilations and Scale Factors

Front

What is a Scale Factor?

Back

A Scale Factor is the number you multiply by the sides of a shape to create a similar figure.

Front

If the scale factor is 2, what does it mean?

Back

It means that the new shape is twice the size of the original shape.

Front

What is the scale factor from a small triangle to a big triangle if the sides are 3 cm and 9 cm?

Back

The scale factor is 3.

Front

If a shape is dilated 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 if the coordinates of point A are (6, 12) and point A' are (4, 8)?

Back

The scale factor is 2/3.

Front

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

Back

Divide the length of a side of the new figure by the length of the corresponding side of the original figure.

Front

If the scale factor is 1, what does that indicate about the two figures?

Back

It indicates that the two figures are congruent, meaning they are the same size.

Front

What is the scale factor if a shape is enlarged from a size of 5 to a size of 15?

Back

The scale factor is 3.

Front

If a rectangle has dimensions 4 cm by 6 cm and is dilated by a scale factor of 2, what are the new dimensions?

Back

The new dimensions are 8 cm by 12 cm.

Front

What is the relationship between corresponding angles in similar figures?

Back

Corresponding angles in similar figures are equal.