3D shapes Welcome

To The Fascinating World Of

3D Shapes

Names of 3D shapes

Cube

cylinder

Sphere

ConeRectangular Prism Square

based

pyramid

Triangular basedpyramid

Triangular prism

Our Topic Of Discussion

• Cube.• Cylinder.• Sphere.• Prism.• Pyramid.

3D Shapes

• 3D shapes can be solid or hollow.• 3D Shapes has 3 dimension:– Length.– Width.– Height.

Now Some Technical Terms To Address3D Shapes

• Surface.• Face.• Base.• Edge.• Corner• Vertex (singular)/Vertices (plural)

Surface

• The curved part of a 3D shape.• Eg: Cylinder & Cone

Surface

Face

• Part of a 3D shape that is flat.

Base• The bottom

face of a 3D object.

Base

Edge

• The line where two faces meet on a 3D object.

6 Edges

5 Edges

Corner

• The point where three or more edges touch.

• This cube has 12 corners all together.

Vertex (Vertices)

• The point where three or more edges meet.• This cube has 12 vertices all together.

Cube

• A three-dimensional shape which has:

–6 Faces (All are of the same size)

–12 Edges

–8 Corners/Vertex

edge

vertex

face

Cylinder

• A three-dimensional shape which has:

–2 Faces

–1 Surface

–0 Edges

–0 Corners/Vertex

face

face

Surface

Sphere• A three-dimensional shape which has:

–0 Faces

–1 Surface

–0 Edges

–0 Corner /Vertex

Surface

• There are different types of prisms and they are based on the shape of its bases:

–Rectangular Prisms

–Square Prisms

–Triangular Prisms

–Hexagonal Prisms

Prism

Pyramids

• There are different types of pyramid and they are based on the shape of its bases:

• Have 1 base.• Have Triangular side faces that meet at one

Vertex.• Examples: Square Pyramid, Triangular Pyramid, Rectangular pyramid etc.

base

Triangular face

Square Pyramid

• A three-dimensional shape which has:

–5 Faces (1 square and 4 triangles)

–8 Edges

–5 Corner /Vertex

Rectangular Pyramid

A three-dimensional shape which has:

–5 Faces (1 Rectangular + 4 Triangles)

–8 Edges

–5 Corner /Vertex

Rectangular face

Triangular face

Prism Vs Pyramid

PRISM-At least 3 Faces that are Rectangles.-Two congruent faces on top and bottom called bases.-The shape of the base determines what type of prism the figure is.

PYRAMID-At least 3 Faces that are Triangles.-One base.-The shape of the base determines what type of prism the figure is.

Quiz Time!!

Let’s Play Naming the Shapes

What shape am I?• I have no flat faces.

• I have no straight edges.

• I have just one curved face.

I am a …………?

Well Done! I am a sphere!

What shape am I?• I have 6 flat square faces

• I have 12 straight edges

• I have 8 corners.

I am a …………?

Fantastic!I am a cube!

What shape am I?• I have one curved face

• I have 2 flat circular faces.

I am a …………?

I am a cylinder

How many edges does a square pyramid have?

a. 4b. 5c. 7d. 8

8 Edges

How many faces of a cube are squares?

a. 2b. 4c. 6d. 8

6