Scaled Copies Vocabulary

Front

Scale Factor

Back

To create a scaled copy, we multiply all the lengths in the original figure by the same number. This number is called the scale factor.

Front

What does a fraction bar mean?

Back

Divide. A fraction is a division problem. Numerator divided by denominator.

Front

Constant of Proportionality

Back

In a proportional relationship, the values for one quantity are each multiplied by the same number to get the values for the other quantity. This number is called the constant of proportionality.

Front

Corresponding Parts

Back

When part of an original figure matches up with part of a copy, we call them corresponding parts. These could be points, segments, angles, or distances.

Front

Center of a Dilation

Back

In a dilation, the fixed point about which the figure is enlarged or reduced. It is the starting point from which we measure distances in a dilation.

Front

What is a scaled copy?

Back

A scaled copy is a copy of a figure where every length in the original figure is multiplied by the same number.

Front

What is a scale drawing?

Back

A scale drawing represents an actual place or object. All the measurements in the drawing correspond to the measurements of the actual object by the same scale.

Front

What is a proportional relationship?

Back

In a proportional relationship, two quantities maintain a constant ratio.

Front

What are similar figures?

Back

Figures that have the same shape but not necessarily the same size. Two figures are similar if one can fit exactly over the other after rigid transformations and dilations.

Front

What does it mean for ratios to be equivalent?

Back

Two ratios are equivalent if you can multiply each of the numbers in the first ratio by the same factor to get the numbers in the second ratio.