The scale factor is determined by comparing actual size to the drawing size.

• A. False
• B. Not Enough Information
• C. True
• D. It Depends

Answer: (C)

Scale factor is the ratio that shows how much one size must be scaled to match the other, using corresponding lengths from the two figures. When you determine it by comparing the actual size to the drawing size, you’re taking the actual length and dividing by the drawing length. That quotient tells you the factor you would multiply the drawing by to reach the real size. For example, if a real object is 12 units long and the drawing shows it as 3 units long, the scale factor is 12 divided by 3, which equals 4. So you multiply the drawing by 4 to get the real size. This way of defining the scale factor is consistent with the statement, so it’s true.