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 model or drawing to the actual object.

Tags

CCSS.7.G.A.1

Front

If a map has a scale of 1 inch = 20 miles, how do you find the actual distance for a measurement on the map?

Back

Multiply the measurement in inches by the scale factor (20 miles). For example, 5.5 inches x 20 miles/inch = 110 miles.

Tags

CCSS.7.RP.A.2C

Front

What is the formula to calculate the actual distance using a scale?

Back

Actual Distance = Measurement on Map x Scale Factor.

Tags

CCSS.7.G.A.1

Front

How do you convert a scale drawing measurement to actual size?

Back

Use the scale factor to multiply the measurement from the drawing to find the actual size.

Tags

CCSS.7.G.A.1

Front

What is the perimeter of a shape?

Back

The perimeter is the total distance around the outside of a shape.

Front

If a scale drawing uses 1 cm = 5 feet, how do you find the perimeter of the actual object?

Back

Measure the perimeter in cm on the drawing and multiply by 5 feet/cm.

Tags

CCSS.7.G.A.1

Front

What is the area of a rectangle?

Back

Area = Length x Width.

Tags

CCSS.3.MD.C.7B

CCSS.4.MD.A.3

Front

How do you find the area of a model using a scale?

Back

First, convert the dimensions from the model to actual size using the scale, then calculate the area using the formula: Area = Length x Width.

Tags

CCSS.7.G.A.1

Front

What does it mean if a scale is 1 inch = 2 feet?

Back

It means that every 1 inch on the drawing represents 2 feet in actual size.

Tags

CCSS.7.G.A.1

Front

How do you set up a proportion to find an unknown length using a scale?

Back

Set up the proportion as: (Scale Length)/(Actual Length) = (Drawing Length)/(x), where x is the unknown actual length.

Tags

CCSS.7.G.A.1