Similar Figures and Scale Factor!

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, some quantity. It is used to determine the ratio of the dimensions of a scale drawing to the actual object.

Front

If a scale factor is greater than 1, what happens to the figure?

Back

The figure is enlarged.

Front

If a scale factor is less than 1, what happens to the figure?

Back

The figure is reduced.

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 the actual distance using a map scale?

Back

Multiply the distance on the map by the scale factor to find the actual distance.

Front

What is the actual length of a car that is 3 cm long on a scale drawing with a scale of 1 cm:4 ft?

Back

12 feet.

Front

What is the scale factor if a figure is enlarged from a size of 2 cm to 6 cm?

Back

The scale factor is 3.

Front

What is the scale factor if a figure is reduced from a size of 8 cm to 4 cm?

Back

The scale factor is 1/2.

Front

How do you determine if two figures are similar?

Back

Check if their corresponding angles are equal and their corresponding sides are proportional.

Front

What is the formula to calculate the actual distance from a map distance?

Back

Actual Distance = Map Distance × Scale Factor.