Stretching and Shrinking Review

Front

What are matching angles called?

Back

Corresponding angles.

Front

If the scale factor is 6, how many times bigger is the perimeter?

Back

6 times bigger.

Front

How does a scale factor of 3 change the area of the new shape?

Back

The new area is 9 times larger than the original.

Front

What does it mean for two shapes to be similar?

Back

They have equal corresponding angles and proportional corresponding sides.

Front

What is the measurement of x if the answer is 20?

Back

x = 20.

Front

What is a scale factor?

Back

A number that scales, or multiplies, a quantity.

Front

How do you find the area of a shape after applying a scale factor?

Back

Multiply the original area by the square of the scale factor.

Front

What is the relationship between corresponding sides of similar shapes?

Back

The ratios of corresponding sides are equal.

Front

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

Back

The perimeter is halved.

Front

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

Back

Their corresponding angles are equal.