Scale drawings

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or space that is proportionally reduced or enlarged to fit on paper, using a specific ratio or scale.

Tags

CCSS.7.G.A.1

Front

What does the scale 2 cm : 1 m mean?

Back

It means that every 2 centimeters on the drawing represents 1 meter in reality.

Tags

CCSS.7.G.A.1

Front

If a scale drawing of a pool is 26 cm, how do you find the actual width?

Back

Use the scale ratio to convert the drawing measurement to the actual size. For a scale of 2 cm : 1 m, divide the drawing size by the scale factor.

Tags

CCSS.7.G.A.1

Front

What is the actual length of a car if the scale drawing is 3 cm and the scale is 1 cm : 4 ft?

Back

The actual length is 12 feet, calculated by multiplying the drawing length by the scale factor (3 cm * 4 ft/cm).

Tags

CCSS.7.G.A.1

Front

Back

Cross-multiply to find x: 15x = 25 * 18, then solve for x.

Tags

CCSS.7.RP.A.2C

Front

Back

x = 30.

Tags

CCSS.7.RP.A.3

Front

If a model of a house is built at a scale of 5 in : 25 ft, how wide is a window that is 1.5 in wide in the model?

Back

The actual width of the window is 7.5 ft, calculated by using the scale ratio.

Tags

CCSS.7.RP.A.2C

Front

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

Back

Actual size = (Drawing size) * (Scale factor).

Tags

CCSS.7.G.A.1

Front

What does it mean if a scale is expressed as 1:100?

Back

It means that 1 unit on the drawing represents 100 units in reality.

Tags

CCSS.7.G.A.1

Front

How do you find the scale factor from a scale drawing?

Back

The scale factor is found by dividing the actual size by the drawing size.

Tags

CCSS.7.G.A.1