The side of a square is 5cm. Its perimeter is __________. [20cm/25cm]
Side of the square =5cm
Perimeter of a square = 4×side
=4×5=20cm
Hence, perimeter of square with side 5cm is 20cm
The perimeter of a square is 20cm. Its side is _ cm.
Add the following lengths
km m cm
20 600 90
40 750 25
+55 800 19
____________________________