Mathematics
Grade 2
15 min
Name the three-dimensional shape
Name the three-dimensional shape
Tutorial Preview
1
Introduction & Learning Objectives
Learning Objectives
Identify a cube from a group of shapes.
Identify a sphere and describe it as round.
Identify a cylinder and point to its flat circle faces.
Identify a cone and point to its one flat circle face and its point.
Identify a pyramid and describe its triangle faces.
Name a 3D shape by looking at a real-world object.
Have you ever wondered why a ball rolls but a toy block doesn't? ð€ Let's find out!
We will learn the special names for shapes that are not flat. These are called three-dimensional shapes. Knowing their names helps us talk about the world around us! ð
Real-World Applications
Building with blocks ð§±
Picking out a can of soup at the store ð¥«
Describing your favorite ball âœ
Eating an ice cream cone ðŠ
2
Key Concepts & Vocabulary
TermDefinitionExample
Cube ð§A shape with 6 flat faces that are all squares. It looks like a box.A dice, an ice cube, or a building block.
Sphere ðA shape that is perfectly round like a ball. It has no flat faces.A basketball, a marble, or an orange.
Cylinder ð¥«A shape with two flat circle faces and one curved side. It looks like a can.A can of soup, a paper towel roll, or a cup.
Cone ðŠA shape with one flat circle face and one point. It looks like a party hat.An ice cream cone, a party hat, or a traffic cone.
Pyramid ðºA shape with a flat bottom and triangle faces that meet at a point on top.The great pyramids in Egypt or a tent.
FaceA flat surface on a three-dimensional shape.One side of a dice is a face.
3
Core Formulas
The Boxy Shape Rule
If all faces are flat squares, it is a `Cube`.
Use this rule when you see a shape that looks like a box. Count the square faces to be sure!
The Rolling Shape Rule
If it is perfectly round with `0` flat faces, it is a `Sphere`.
Use this rule for shapes that can roll easily in any direction, like a ball.
The Pointy Top Rule
If it has a flat circle bottom and `1` point, it is a `Cone`.
Look for a shape that looks like a party hat. Check for the circle at the bottom and the point at the top.
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Challenging
If you place two identical sugar cubes right next to each other and they stick together, what new, longer shape have you made?
A.bigger cube
B.Pyramid
C.Rectangular Prism
D.Cylinder
Challenging
A shape's shadow is a circle. When you turn the shape and shine the light from the side, the shadow is a rectangle. What shape must it be?
A.Sphere
B.Cone
C.Cylinder
D.Cube
Challenging
A wizard says his magic crystal has no flat faces, no edges, and no corners. What must be the shape of the crystal?
A.Cylinder
B.Sphere
C.Cone
D.Pyramid
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