The things around us come in many solid shapes: flat boxes, round balls, tall cylinders, and pointy cones.
A box has flat faces, so it stacks up neatly, while a ball is round on every side and rolls anywhere.
Think of dice, a soccer ball, or a can.
Pick each shape here to see which ones roll and which ones stack.
Shapes Around Us
👀 Let's Find Shapes!
①Many shapes are around us
②Box, cylinder, ball, pointy
③Each shape has different features
Let's Look at Shapes
0 Box Shape
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Visualizing 4 kinds of 3D shapes
🔍 Box Shape
①Box shape has flat faces
②Dice, bricks, boxes are box shaped
③Can stack! Does not roll well
④Made of 6 flat faces
Comparing Shape Features
🤔 Rolling and Stacking
①Rolls well: ball, cylinder
②Stacks well: box
③A ball rolls in any direction
④A box stacks easily
Summary
Box Shape
Box = 6 flat faces
Stacks well, does not roll
Cylinder
Can = round + flat faces
Rolls in one direction
Ball & Cone
= all round / = pointy top
Ball rolls anywhere, cone stands up
🎯 Remember!
①4 shapes: box, cylinder, ball, cone
②Flat face → can stack
③Round face → rolls
④Find all 4 shapes around you!
⑤Next is 2D shapes!
Examples and Unit Test
Example 1
What shape is a soccer ball, and why does it roll so well?
1
A soccer ball is round from every side, so it is a ball shape.
2
It has no flat faces at all, so it rolls in any direction.
▸ Ball shape (rolls in any direction)
Only curved surfaces and no flat faces means it rolls well.
Example 2
Which shape stacks well and barely rolls, and why?
1
To stack things up, you need flat faces.
2
A box shape has 6 flat faces, so it stacks well and does not roll.
▸ Box shape (6 flat faces)
Flat faces are good for stacking; curved surfaces are good for rolling.
Unit Test
Which object is a ball shape?
①a die
②a drink can
③a marble
④a brick
▸ ③ a marble
1
A ball shape is round from every side with no flat faces.
2
A die and a brick are box shapes, a drink can is a cylinder, and a marble is a ball shape.