Scale Drawings

Front

What is a scale drawing?

Back

A scale drawing is a representation of an object or a place that is proportionally reduced or enlarged to fit on paper, maintaining the same ratios as the original.

Front

What is a scale factor?

Back

A scale factor is a number that scales, or multiplies, the dimensions of a figure. It indicates how much larger or smaller the drawing is compared to the actual object.

Front

If a scale factor is 1/3, what does it mean?

Back

It means the drawing is one-third the size of the actual object.

Front

If a scale factor is 5/2, what does it mean?

Back

It means the drawing is two and a half times larger than the actual object.

Front

How do you calculate the dimensions of a scale drawing?

Back

To calculate the dimensions, multiply the actual dimensions by the scale factor.

Front

What is the scale factor if a rectangle is enlarged from 4 cm to 10 cm?

Back

The scale factor is 10/4 or 2.5.

Front

What is the scale factor if a rectangle is reduced from 12 cm to 3 cm?

Back

The scale factor is 3/12 or 1/4.

Front

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

Back

To find the actual size, divide the dimensions of the drawing by the scale factor.

Front

What is the relationship between scale factor and area?

Back

The area of a scale drawing is proportional to the square of the scale factor.

Front

If a scale drawing has a scale factor of 1/2, what happens to the area?

Back

The area is reduced to 1/4 of the original area because (1/2)² = 1/4.