measure size of school field

1. units

1.1. cm

1.2. m

1.3. km

1.4. mm

2. tools

2.1. metre rule

2.2. measuring tape

2.3. string

2.4. foot steps

2.5. lamp posts

3. purpose

3.1. find area

3.2. find dimensions

3.3. hold sports event

3.4. maintenance cost