1. Geometry Scale

2. Geometry Scale is used when something that is drawn on paper is too large to fit, or is too small to be seen. For now we are going to concentrate of big objects.

3. Geometry This diagram shows the front of a house drawn to a scale of 1:100 What is the width of the house in metres? 1cm here = 100cm on the actual house. 10cm

4. Geometry If 1cm = 100cm 10cm = 1000cm What is this in metres? 100cm = 1m 1000cm = 10m 10cm

5. Geometry Things to be careful of when working with scales… Always make sure you have got both sides using the same units. You may be told 1cm = 5m. Convert this to 1cm = 500cm

6. Geometry Things to be careful of when working with scales… When converting, be careful of your zeros!!! 10mm = 1cm 100cm = 1m 1000m = 1km