Understanding the Scale: RF = 1/100
To create a plane scale with a representative fraction (RF) of 1/100, you need to understand that this scale means 1 unit on the scale represents 100 units in reality. In this case, we want to measure distances in meters and decimeters up to 10 meters.
Scale Length Calculation
- Since we need to measure 10 meters, we will calculate the scale length:
- 10 meters = 1000 centimeters
- At RF = 1/100, the length on the scale will be:
- Total length = 1000 cm / 100 = 10 cm
Scale Construction
- Draw a straight line of 10 cm on a piece of paper.
- Mark the starting point as 0 cm (0 m).
- Divide this line into sections representing meters and decimeters:
- Each 1 cm represents 1 m.
- Each 0.1 cm represents 1 dm.
- Label the divisions accordingly:
- 0 cm (0 m)
- 1 cm (1 m)
- 2 cm (2 m)
- 3 cm (3 m)
- 4 cm (4 m)
- 5 cm (5 m)
- 6 cm (6 m)
- 7 cm (7 m)
- 8 cm (8 m)
- 9 cm (9 m)
- 10 cm (10 m)
Marking 7.6 Meters
- To represent 7.6 meters on the scale:
- Locate the 7 cm mark (7 m).
- Count 6 decimeters (0.6 m):
- Each decimeter is equivalent to 0.1 cm on the scale, so:
- 0.6 m = 6 divisions of 0.1 cm beyond the 7 cm mark.
- Mark the 7.6 m point clearly on the scale.
This way, the plane scale accurately represents distances up to 10 m, and you can easily read 7.6 m.