measuring perimeter

Measuring Perimeter

Perimeter is the distance around the outside of an object. Students can find ways that we use perimeter in real life situations: measuring a picture frame, trim to go around a wall, door frame, fencing around a yard, stones around a garden etc......

Step 1 is to measure and add.

Step 2 is to add all of the sides and figure out if a side is missing. 3cm + 4cm+ ? = 9cm   So add 2 cm for the missing piece on the top.

Step 3: For perimeter on a grid, learning how to count the cm  as spaces around can be tricky for some students. Marking where you start may help.

Step 4: And irregular shapes on a grid Students must be careful not to get lost while counting.

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