Examples and properties of threedimensional shapes.
CLASS: Basic 3
SUBJECT: Mathematics
TOPIC: Threedimensional shapes (Revision)
CONTENT:
Threedimensional shapes are shapes which can be measured in 3 directions. These shapes are also called solid shapes. They have Length,
width, and height which are the three measurements of the threedimensional shapes.
Examples of threedimensional shapes are:
Cube
Cuboid
Cylinder
Cone
Sphere
Threedimensional shapes have many
attributes such as:
Vertices
Faces, and
Edges.
Vertices: These are points where 3 edges meet.
Faces: These are the flat surfaces of the threedimensional shapes.
Edges: These are the line segment where two faces meet. Don’t worry the diagram below will explain it better.
Examples and properties of threedimensional shapes.
 Cube, E.g dice, st. Luis cube sugar etc.
* It has 6 faces.
* It has 12 edges.
*It has 8 vertices.
Each face of a cube is square in shape.
 Cuboid, E.g rectangular box, rectangular cupboard etc.
* It has 6 faces
* It has 12 edges.
* It has 8 vertices.
Each face of a cuboid is rectangle in shape.
 Cylinder, E.g Gas cylinder, milo tin, milk tin etc.
* It has 2 circular faces.
* It has 1 curved surface.
* It has 2 circular edges.
 Cone, E.g Ice cream, Christmas cap etc.
* It has 1 circular base.
* It has 1 curved surface.
* It has 1 circular edge.
 Sphere, E.g balls
* It has no vertex.
* It has no edge.
* It has 1 curved surface.
EVALUATION:

List three objects in your environment that have the shape of cylinder.

List two objects in your environment that have the shape of sphere.

A cube has ________ vertices.

How many edges has a sphere?

Draw a cone.

State the three attributes of threedimensional shapes.