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Geometrical Shapes: Definition
Geometrical shapes are the figures or objects that we see around us everywhere.
These different shapes of geometry are made up of lines, curves, angles and surfaces.
The shapes in geometry can be either open or closely bound.
Open Shapes
Lines or curves that do not connect at any one point are called open shapes.
Closed Shapes
In closed shapes, all the lines and curves are connected with each other.
There are many different types of shapes in Maths.
We will learn about them shortly.
Now, try to draw some fun shapes using various colours.
Identify if these Math shapes are open or closed.
List of Geometric Shapes
There are many geometrical shapes we see around us every day.
Mathematical shapes can be two dimensional and three dimensional.
Twodimensional shapes include circles, triangles, rectangles, squares, stars, hearts, ovals, and so on.
These shapes have only two dimensions or parameters.
Threedimensional shapes include cones, spheres, cubes, cuboids, cylinders, etc.
These shapes have three dimensions and many faces.
Let us look briefly into two dimensional and three dimensional shapes.
TwoDimensional shapes
A 2D shape in maths consists of only two dimensions such as length and breadth.
It consists of a flat surface.
Some of the common 2D shapes in Maths are listed below.
1. Circle
A circle is a closed twodimensional figure which is round in shape.
A circle does not have any sides or corners.
Can you spot any figure with the shape of a circle around you?
Here are some familiar objects that have the shape of a circle.
2. Square
A square is a twodimensional shape that consists of four sides which are all equal.
Can you think of any figure or object that is square in shape?
Do you play chess or carrom?
Imagine the shapes of a chessboard and a carrom board.
You can see that all the four sides of these boards are equal.
Thus, they are squares.
3. Triangle
A triangle is a closed twodimensional shape with three sides.
Do you like watermelon?
Most of us like it.
We cut the watermelon into slices.
Have you ever observed the shape of a slice of watermelon?
It is triangular in shape.
Have you observed the shape of a slice of pizza?
Do you think it is triangular in shape?
Yes, you are right, it is triangular in shape.
4. Rectangle
A rectangle is a foursided, twodimensional shape in which the length of the opposite sides are equal.
A square is also a type of rectangle.
Rectangular shape can have two variations in their forms: either the length or the breadth can be greater.
Now look around and identify objects that are rectangular in shape.
Observe your computer or laptop monitor.
What shape does it have?
Yes, it is a rectangle!
5. Oval
An oval is similar to a circle but its shape is slightly elongated in nature.
An oval also does not have any sides or corners.
Similar to the shapes described above, there are several twodimensional shapes in geometry.
Now, let's summarize all the 2D shapes.
Twodimensional shapes with one face and different sides
Look around you and identify more shapes with two dimensions.
Twodimensional shapes that have four sides (square, rectangle, kite, trapezoid) are called quadrilaterals.
In general, any shape with four sides is considered a quadrilateral shape.
Look at the following pictures and identify the shape of each object.
Are these twodimensional shapes?
No, these shapes have length, breadth, and some thickness.
Hence, these objects have three dimensions.
Let us now learn more about threedimensional shapes.
ThreeDimensional Shapes
A 3D shape is a solid figure that consists of three dimensions such as length, breadth, and height.
Threedimensional shapes have some thickness or depth.
Mathematical shapes are present everywhere and we see many different shapes around us.
Everything we see has some shape.
Consider this example of a globe.
This is the globe of our planet, Earth.
Can you guess what is the shape of our planet?
It is a sphere.
Sphere
A sphere is a threedimensional shape that rotates in a circle.
A sphere does not have any sides or corners.
Have you observed a football or a basketball?
These balls are examples of spheres.
Do you like ice cream?
What type of ice cream do you prefer?
If you observe an ice cream cone, you may be able to notice that it has a distinct shape too.
What is this shape?
You are right! It is a cone.
Now, let us learn more about this shape.
Cone
A cone is a threedimensional shape that is derived from a triangle.
You can observe that the following objects are all conical in shape.
Have you ever played with a Rubric's square?
The Rubric's square shown below has 6 faces with 6 colors each.
We shuffle and arrange until we get the same color on each face.
Have you noticed its shape?
What is the shape of this Rubric's square?
It is a cube.
Cube
A cube is a threedimensional solid object with 6 square faces.
Look at the figures shown below.
Are they all cubes?
Do you notice a pencil box among the figures?
Would you agree that the pencil box has the shape of a cube?
No, the shape of the pencil box is not a cube.
It is a cuboid.
Cuboid
A cuboid is a threedimensional solid figure which has six faces like a cube but it is derived from a rectangle.
The figures shown below are examples of cuboids.
Likewise, there are many different threedimensional shapes present in geometry.
Look around you and identify various shapes with three dimensions.
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Solved Examples on Shapes
Example 1 
Reena invited her friends for her birthday party.
She distributed birthday caps to all her friends.
Identify the shape of their birthday caps.
Solution:
Their birthday caps resemble the shape of a cone.
Example 2 
Sonu ordered a sandwich at a restaurant.
He requested the waiter to cut the sandwich into two pieces.
What was the shape of those two pieces?
Solution:
The two pieces of the sandwich were cut in the shape of a triangle.
Example 3 
Alex went to a gift shop to buy a gift for his friend.
He bought building blocks.
He wants to pack his gift in a box.
Help Alex find the right box to place the gift.
Solution:
The shapes of the gift boxes are cylinder, cube and sphere.
The building blocks are in the form of a cube.
Therefore, the box shaped like a cube is the right shape to pack the building blocks.
Thus, Cube is the right shape. 
Example 4 
How many sides does a football have?
Solution:
Football is in the shape of a sphere.
Thus, it does not have any sides.
Thus, there are zero sides in a football. 
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Practice Questions on Shapes
Here are a few activities for you to practice.
Select/Type your answer and click the "Check Answer" button to see the result.
1. How many triangles are there in this figure?
Maths Olympiad Sample Papers
IMO (International Maths Olympiad) is a competitive exam in Mathematics conducted annually for school students. It encourages children to develop their math solving skills from a competition perspective.
You can download the FREE gradewise sample papers from below:
 IMO Sample Paper Class 1
 IMO Sample Paper Class 2
 IMO Sample Paper Class 3
 IMO Sample Paper Class 4
 IMO Sample Paper Class 5
 IMO Sample Paper Class 6
 IMO Sample Paper Class 7
 IMO Sample Paper Class 8
 IMO Sample Paper Class 9
 IMO Sample Paper Class 10
To know more about the Maths Olympiad you can click here
Frequently Asked Questions (FAQs)
1. What are the basic geometric shapes?
The basic geometric shapes have two dimensions. They are:

Circle

Square

Triangle

Rectangle

Oval
2. What are the 16 basic shapes?
The 16 basic shapes are: Triangle, Square, Rectangle, Kite, Rhombus, Trapezium, Pentagon, Hexagon, Nonagon, Decagon, Dodecagon, Hexadecagon, Star, Oval, Ellipse and Circle.
3. What are all the shapes in geometry?
There are many different shapes in geometry which are open or closed, two dimensional or three dimensional.
4. What are the 8 basic shapes?
The eight basic shapes are: circle, triangle, rectangle, square, kite, star, heart and oval.