7.4 Practice Scale Factor & Vocabulary

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, a quantity. In geometry, it is the ratio of the lengths of two corresponding sides of similar figures.

Front

If a square with a side length of 10 inches is dilated to a square with a side length of 2.5 inches, what is the scale factor?

Back

1/4

Front

A rectangle has dimensions of 4 cm by 6 cm. After a dilation, the rectangle has dimensions of 8 cm by 12 cm. What is the scale factor of this dilation?

Back

2

Front

What does it mean for figures to be congruent?

Back

Congruent figures are figures that are the SAME size and the SAME shape.

Front

Does a dilation produce a congruent figure?

Back

False

Front

What is the result of a dilation with a scale factor greater than 1?

Back

An enlargement of the figure.

Front

What is the result of a dilation with a scale factor less than 1?

Back

A reduction of the figure.

Front

Figure A is dilated by a scale factor of 4. If Figure A originally has dimensions of 3 inches by 2 inches, what are the new dimensions?

Back

12 inches by 8 inches

Front

What is the scale factor if a triangle with sides of 3 cm is dilated to a triangle with sides of 9 cm?

Back

3

Front

What is the scale factor if a circle with a radius of 5 cm is dilated to a circle with a radius of 10 cm?

Back

2