Examples and properties of three-dimensional shapes.
CLASS: Basic 3
SUBJECT: Mathematics
TOPIC: Three-dimensional shapes (Revision)
CONTENT:
Three-dimensional 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 three-dimensional shapes.
Examples of three-dimensional shapes are:
Cube
Cuboid
Cylinder
Cone
Sphere
Three-dimensional 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 three-dimensional 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 three-dimensional 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 three-dimensional shapes.