Stretching and Shrinking Review

Front

What does it mean for two shapes to be similar?

Back

Two shapes are similar if their corresponding angles are equal and the ratios of their corresponding sides are equal.

Front

How does a scale factor of 3 affect the dimensions of a shape?

Back

A scale factor of 3 means that each dimension of the shape is multiplied by 3, making the shape larger.

Front

What happens to the perimeter of a shape when the scale factor is 1/2?

Back

The new perimeter is 1/2 the size of the original perimeter.

Front

What are corresponding sides?

Back

Corresponding sides are the sides of two shapes that are in the same relative position.

Front

If a shape is enlarged by a scale factor of 4, how does this affect the area?

Back

The area of the shape becomes 16 times larger because area scales by the square of the scale factor.

Front

What is the rule for translating a figure 3 units left and 2 units up?

Back

(x - 3, y + 2) is the rule for this translation.

Front

What is the relationship between corresponding angles in similar shapes?

Back

In similar shapes, corresponding angles are always equal.

Front

If two triangles have sides in the ratio of 2:3, are they similar?

Back

No, they are not similar unless their corresponding angles are also equal.

Front

What does a scale factor of 1 indicate?

Back

A scale factor of 1 indicates that the shape remains the same size; it is neither enlarged nor reduced.

Front

How do you determine if two shapes are similar using side lengths?

Back

You compare the ratios of their corresponding side lengths; if the ratios are equal, the shapes are similar.