2D Shapes

In geometry, 2d shapes and 3d shapes are explained widely to make you understand the different types of objects you come across in real life. These shapes have their own pattern and properties. The properties of different shapes depend on many factors, such as angle, sides, length, height, width, area, volume, etc. These 2D and 3D shapes have been taught to us since our primary classes. Let us learn various types of two-dimensional shapes here, in this article.

2D Shapes Names

  1. Circle
  2. Triangle
  3. Square
  4. Rectangle
  5. Pentagon
  6. Octagon

The basic types of 2d shapes are a circle, triangle, square, rectangle, pentagon, quadrilateral, hexagon, octagon, etc. Apart from the circle, all the shapes which have sides are considered as polygons. A polygon which has all the sides and angles as equal are called like a regular polygon. Including circle, an ellipse is also a non-polygon shape. Both circle and ellipse have curve shape whereas the polygons are the closed structure. Now let us discuss some shapes one by one.


A circle is a closed 2d figure in which the set of all the points in the plane is equidistant from a given point called “center”. The distance from the center to the outer line of the circle is called a radius. The example of the circle in real life are wheels, pizzas, orbit, etc.



A triangle is a three-sided polygon (2d Shape) which has three edges and three vertices. The sum of all the three angles of a triangle is equal to 180°. Pyramids are the best example of a triangle shape. You can also learn properties of triangle here.



A square is a four-sided polygon (2d Shape), whose all the sides are equal in length and all the angles are equal to 90°. It is also said to be a two-dimensional regular quadrilateral. The diagonals of the square also bisect each other at 90°. A wall or a table where all the sides are equal the examples of square shape.



A rectangle is a 2d shape which has four sides, where the opposite sides are equal and parallel to each other. All the angles of a rectangle are equal to 90°. A brick, TV, cardboard, which has length and breadth are examples of the rectangle.



A Pentagon is a five-sided polygon (2d Shape) and it can be regular or irregular. In the case of regular pentagon, the interior angles are equal to 108° and exterior angles are 72°. It has five diagonals. The Pentagon building, which is the headquarters of the US Department of Defense, is a big example of pentagon shape.



An octagon is an eight-sided polygon which can be regular and irregular both. It is a 2d shape which has eight angles. The sum of all the angles of an octagon is 1080°. The stop sign board have an octagon shape, which you can see on the roadside.


Depends upon the shape of the bases, the prisms are named in two different way. Learn types of prism online with the different types, the volume of sphere and examples online

2 D Shapes Properties

Find the table below to learn all the properties of 2D shapes.

2 D Shapes Properties of 2 D Shapes
Square Four equal sides Four equal angles(90°) Four axes of symmetry
Rectangle 2 sets of 2 equal sides Four equal angles(90°) Two axes of symmetry
Triangle Can have no, 2 or 3 equal sides Can have no, 2 or 3 equal angles Can have up to 2 axes of


Circle Constant diameter and


Almost infinite axes of

symmetry going through

the centre

pentagon 5 sides (can be equal) 5 angles (can be equal) Can have up to 5 axes

of symmetry

hexagon 6 sides (can be equal) 6 angles (can be equal) Can have up to 6 axes of


Octagon 8 sides (can be equal) 8 angles (can be equal) Can have up to 8 axes of


Parallelogram 2 sets of 2 equal sides 2 sets of 2 equal angles Usually no axes of symmetry
Rhombus All sides the same length 2 sets of 2 equal angles 2 lines of symmetry
Trapezium At least 2 parallel sides Can have pairs of equal


Can have a line of



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