Similar Polygons

Front

What are similar polygons?

Back

Polygons that have the same shape but may have different sizes. Their corresponding angles are equal, and their corresponding sides are in proportion.

Front

What is the scale factor in similar polygons?

Back

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

Front

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

Back

Their corresponding angles are equal.

Front

If the sides of two similar triangles are in the ratio 2:3, what is the scale factor?

Back

The scale factor is 2:3.

Front

How do you find the length of a side in similar polygons?

Back

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

Front

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

Back

The ratio of their areas is the square of the ratio of their corresponding side lengths.

Front

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

Back

The scale factor is 1:2.

Front

What does it mean if two figures are not similar?

Back

It means that their corresponding angles are not equal or their corresponding sides are not in proportion.

Front

If the corresponding sides of two similar polygons are 5 cm and 15 cm, what is the ratio of their sides?

Back

The ratio of their sides is 1:3.

Front

How can you determine if two polygons are similar?

Back

Check if their corresponding angles are equal and their corresponding sides are in proportion.