 # 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. Depending on many factors, such as angle, sides, length, height, width, area, volume, etc., the shapes can vary. 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 are considered as polygons, which has sides. A polygon which has all the sides and angles as equal is called a regular polygon. Including circle, an ellipse is also a non-polygon shape. Both circle and ellipse have a curve shape, whereas the polygons have a closed structure with sides. Now let us discuss some shapes one by one.

### Circle

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. ### Triangle

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 the properties of triangle here. ### Square

A square is a four-sided polygon (2d Shape), whose four sides are equal in length and all the angles are equal to 90°. It is considered 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 are the examples of square shape. ### Rectangle

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. ### Pentagon

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

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

Go through the 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 It can have no, 2 or 3 equal sides It can have no, 2 or 3 equal angles It can have up to 2 axes of symmetry Circle Constant diameter and radius The total angle of a circle is equal to 360 degrees Almost infinite axes of symmetry going through the centre pentagon 5 sides (can be equal or unequal) 5 angles (can be equal or unequal) It can have up to 5 axes of symmetry hexagon 6 sides (can be equal or unequal) 6 angles (can be equal or unequal) It can have up to 6 axes of symmetry Octagon 8 sides (can be equal or unequal) 8 angles (can be equal or unequal) It can have up to 8 axes of symmetry 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 angles It can have a line of symmetry