Stretching and Shrinking Unit Test Review - 2024

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. It is used to determine how much larger or smaller a figure is compared to the original.

Front

If a shape is reduced by a scale factor of 1/2, what happens to its size?

Back

The shape becomes smaller, as each dimension is multiplied by 1/2.

Front

What does it mean if the scale factor is greater than 1?

Back

If the scale factor is greater than 1, the new figure is an enlargement of the original figure.

Front

How do you determine if two figures are similar?

Back

Two figures are similar if their corresponding angles are equal and the lengths of their corresponding sides are proportional.

Front

What is the relationship between the dimensions of similar figures?

Back

The dimensions of similar figures are proportional to each other, meaning the ratio of corresponding sides is constant.

Front

If a triangle has sides of 3 cm, 4 cm, and 5 cm, and is enlarged by a scale factor of 2, what are the new side lengths?

Back

The new side lengths will be 6 cm, 8 cm, and 10 cm.

Front

What is the formula for finding the area of a triangle?

Back

Area = 1/2 * base * height.

Front

If the original triangle has an area of 20 square units and is reduced by a scale factor of 1/2, what is the area of the new triangle?

Back

The area of the new triangle will be 5 square units.

Front

What does it mean for a figure to be 'not similar'?

Back

A figure is 'not similar' if the corresponding angles are not equal or the sides are not proportional.

Front

In the context of stretching and shrinking, what does 'enlargement' refer to?

Back

Enlargement refers to increasing the size of a figure while maintaining its shape.