Scale Models and Factors Practice

Front

What does it mean for two figures to be similar?

Back

Two figures are similar if they have the same shape and their corresponding side lengths are proportional.

Front

How do you find a missing side in similar figures?

Back

To find a missing side in similar figures, set up a proportion using the lengths of the corresponding sides.

Front

If the scale is 1 in = 7 ft, how do you convert actual measurements to the scale?

Back

To convert actual measurements to the scale, divide the actual measurement by the scale factor (7 ft) to get the measurement in inches.

Front

What is a proportional relationship?

Back

A proportional relationship is one where two quantities maintain a constant ratio.

Front

How can you tell if a table represents a proportional relationship?

Back

A table represents a proportional relationship if the ratios of the corresponding values are equal.

Front

What is the scale factor in a scale model?

Back

The scale factor is the ratio of a length in the model to the corresponding length in the actual object.

Front

If a model is 1/10 the size of the actual object, what is the scale factor?

Back

The scale factor is 1:10.

Front

How do you solve a proportion?

Back

To solve a proportion, cross-multiply and then divide to find the unknown value.

Front

What is the formula for finding the area of similar figures?

Back

The area of similar figures is proportional to the square of the scale factor.

Front

If two triangles are similar, how do their areas compare?

Back

The areas of two similar triangles are in the ratio of the square of their corresponding side lengths.