I can use a scale drawing to represent actual lengths and areas.

SCALE FACTOR AND SCALE DRAWINGS

The scale factor of a scale drawing is the ratio of an actual length, y, to

the corresponding length, x, in the drawing. The ratio is the constant of

proportionality, k, that relates the actual figure to the scale drawing. You

can use a proportion or use an equation of the form y = kx to solve problems

involving scale drawings.

DIAGRAM: TRIANGULAR SCALE DRAWING

A right triangle is shown with a horizontal base of 4.5 in. and a vertical

height of 3 in.

Scale: 1 in. = 2 yd.

Scale relationship shown in the image:

2 yd / 1 in. = y / x

 y = 2x

Here x represents a drawing length measured in inches and y represents

its corresponding actual length measured in yards.