8.1 Scale Drawings

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object that is proportional to its actual size, using a specific ratio or scale.

Front

What does a scale factor represent?

Back

A scale factor is the ratio of the dimensions of the drawing to the dimensions of the actual object.

Front

If a scale factor is 1:4, what does this mean?

Back

This means that 1 unit on the drawing represents 4 units in reality.

Front

How do you calculate the actual size from a scale drawing?

Back

Multiply the measurement on the drawing by the scale factor.

Front

If a flagpole measures 12 inches on a scale drawing with a scale of 1 in = 4 ft, how tall is the actual pole?

Back

48 feet.

Front

What is the scale factor if a picture measures 3 cm and the actual object is 12 ft?

Back

4.

Front

What happens to the size of a figure if the scale factor is greater than 1?

Back

The figure gets bigger.

Front

What is the scale factor from a small fry to a large fry if the large fry is 3 times bigger?

Back

3.

Front

If a rectangle in a scale drawing has a length of 5 cm and the scale factor is 2, what is the actual length?

Back

10 cm.

Front

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

Back

Divide the length of a side of the larger figure by the corresponding side of the smaller figure.