Identify Similar Shapes 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

What does it mean for two shapes to be similar?

Back

Two shapes are similar if they have the same shape but not necessarily the same size, and their corresponding angles are congruent.

Front

How do you determine if two shapes are scale copies?

Back

Two shapes are scale copies if their corresponding angles are congruent and the lengths of their corresponding sides are proportional.

Front

If a shape is enlarged by a scale factor of 2, what happens to its dimensions?

Back

All dimensions of the shape are doubled.

Front

What is the scale factor from a small shape to a big shape if the sides of the big shape are 3 times longer?

Back

The scale factor is 3.

Front

Which side corresponds to side AB in a similar shape?

Back

To find the corresponding side, compare the positions of the sides in both shapes.

Front

If the scale factor is 1/2, what does that mean for the dimensions of the shape?

Back

The dimensions of the shape are halved.

Front

What is the relationship between corresponding angles in similar shapes?

Back

Corresponding angles in similar shapes are always congruent.

Front

If two shapes are not the same size but are the same shape, what are they called?

Back

They are called scale copies.

Front

How can you find the scale factor between two similar shapes?

Back

Divide the length of a side of the larger shape by the length of the corresponding side of the smaller shape.