Similar figures and Scale Factor

Front

What are similar figures?

Back

Figures that have the same shape but may differ in size.

Front

What does scale factor mean?

Back

The ratio of the lengths of corresponding sides of two similar figures.

Front

Are all angles in similar figures congruent?

Back

Yes, all corresponding angles in similar figures are congruent.

Front

Does a dilation produce a congruent figure?

Back

No, a dilation produces a figure that is similar but not necessarily congruent.

Front

If the scale factor is greater than one, what happens to the figure?

Back

The figure is enlarged.

Front

If the scale factor is less than one, what happens to the figure?

Back

The figure is reduced.

Front

How do you find the missing side of similar figures?

Back

Use the scale factor to set up a proportion between the corresponding sides.

Front

What is the coordinate of the image of point B (4,9) under a dilation with center at the origin and scale factor of 2?

Back

B' (8, 18)