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