Scale Drawings and Similar Figures

Front

What is a scale drawing?

Back

Bigger or smaller proportion of an actual object.

Front

What does the similarity statement ΔXYZ~ΔNEW indicate?

Back

Triangles XYZ and NEW are similar, meaning their corresponding angles are equal and their sides are in proportion.

Front

If ΔCDE∼ΔFGH, what can be said about the angles?

Back

@@ ext{If } riangle CDE ext{ is similar to } riangle FGH, ext{ then } riangle C ext{ corresponds to } riangle H, riangle D ext{ corresponds to } riangle G, ext{ and } riangle E ext{ corresponds to } riangle F.$$

Front

Which proportion is true for similar rectangles ABCD and EFGD?

Back

@@rac{AB}{EF}=rac{BC}{FG}$$

Front

What is the definition of similar figures?

Back

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

Front

What is the relationship between corresponding angles in similar triangles?

Back

Corresponding angles are equal.

Front

What is the relationship between corresponding sides in similar triangles?

Back

The ratios of the lengths of corresponding sides are equal.

Front

If two triangles are similar, what can be said about their perimeters?

Back

The ratio of their perimeters is equal to the ratio of their corresponding sides.

Front

What is the scale factor in similar figures?

Back

The ratio of the lengths of corresponding sides.

Front

How do you determine if two triangles are similar?

Back

By checking if their corresponding angles are equal or if the sides are in proportion.