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UNIT 4
3-D Shapes
Place 20 or more cards one by one exactly on top of one another as shown.
From the pile of cards, we can identify another side apart from the length and the breadth.
Apart from the length and breadth, the pile of cards has a third side known as the height.
The shape now has a length, a breadth and a height. We say that it has three dimensions
(3-D). We refer to such a shape as a 3-D shape.
Activity 1
Observe the card shown.
Thecardisrectangular,thinandat.
It has a length and a breadth .
It is a 2-D shape.
length
breadth
length
height
breadth
length
breadth
height
length
breadth