四下第四單元
周長與面積 Perimeter and Area
4-1
My friend perimeter
He’s a bit of an outsider
He’s on edge today
Then again he always seems to be that way
My friend area
Lives his life within the perimeter
He takes up a lot of space
You can always find him all over the place
Perimeter is the distance around a shape=adding all of the sides together.
4-2