Similar Figures

Front

What are similar figures?

Back

Two figures that have the same shape but may differ in size.

Front

What are corresponding angles?

Back

Angles that are in the same position in two similar figures.

Front

If two triangles are similar, what can we say about their corresponding sides?

Back

The ratios of their corresponding sides are equal.

Front

What is the scale factor in similar figures?

Back

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

Front

If triangle ABC is similar to triangle DEF, and the length of side AB is 4 cm and side DE is 8 cm, what is the scale factor?

Back

The scale factor is 2.

Front

What is the relationship between the areas of two similar figures?

Back

The ratio of their areas is the square of the scale factor.

Front

If the scale factor of two similar figures is 3:1, what is the ratio of their areas?

Back

The ratio of their areas is 9:1.

Front

How do you find a missing side in similar figures?

Back

Set up a proportion using the lengths of corresponding sides.

Front

What does it mean if two angles are congruent?

Back

They have the same measure.

Front

If two figures are similar, what can be said about their angles?

Back

All corresponding angles are equal.