To find the scale for a scale drawing, you need to know the ratio of the measurements on the drawing to the actual measurements of the object being drawn. Here is an easy way to find the scale:
1. Measure the length or width of the object you are drawing with a ruler or measuring tape.
2. Measure the length or width of the same object on the scale drawing.
3. Divide the length or width of the object by the length or width on the scale drawing to find the scale ratio.
4. Express the ratio as a fraction or a ratio (e.g. 1:100, 1/4) to represent the scale of the drawing.
For example, if the actual length of the object is 10 inches and the length on the scale drawing is 2 inches, the scale would be 10:2 or 10/2, which simplifies to 5:1 or 5/1. This means that 1 inch on the scale drawing represents 5 inches in real life.