Scale and Scale Factor Unit Review

Front

What is a scale in mapping?

Back

A scale is a ratio that compares a distance on a map to the actual distance it represents in real life.

Front

How do you calculate actual distance using a scale?

Back

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

Front

If a map scale is 1 inch = 300 miles, what is the actual distance for 3 inches?

Back

900 miles (3 inches x 300 miles/inch).

Front

What does a scale factor represent?

Back

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

Front

If a scale drawing uses a scale of 1 cm = 5 km, how far apart are two cities that are 3 cm apart on the map?

Back

15 km (3 cm x 5 km/cm).

Front

What is the formula to convert a scale drawing measurement to actual size?

Back

Actual size = Measurement on drawing x Scale factor.

Front

If a backyard is 78 feet long in real life and the scale is 1 inch = 2 feet, how long is it in the drawing?

Back

39 inches (78 feet ÷ 2 feet/inch).

Front

What is the scale factor if triangle ABC is reduced to triangle DEF with a ratio of 1:8?

Back

1/8.

Front

How do you find the scale factor between two similar figures?

Back

Divide the length of a side of the image by the corresponding side of the original figure.

Front

If a triangle's side measures 4 ft in the original and 2 ft in the image, what is the scale factor?

Back

1/2.