This activity is about converting areas in cm² to areas in mm².
The diagram above shows a 1 cm square of area 1 cm2.
Each side is 1 cm or 10 mm long.
Each tiny square is 1 mm long and has an area of 1 mm2.
Ten of these tiny squares fit along each side. There are 100 in total.
1 cm2 = 100 mm2
It is really important to understand that although the conversion factor between cm and mm is 10
(1 cm = 10 mm), the conversion factor between cm2 and mm2 is 100!
Change the area in cm² to an area in mm².
|11 cm2 =||
11 x 100 = 1,100 mm2
Are you ready to have a go at some questions now?
If you find this tricky, you can look at the introduction again by clicking on the red help button on the screen.