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 depending 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
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 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 also have a closed structure with sides. 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 the properties of triangle here.
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 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 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.
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 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
|Circle||Constant diameter and
|The total angle of a circle is equal to 360 degrees||Almost infinite axes of
symmetry going through
|pentagon||5 sides (can be equal or unequal)||5 angles (can be equal or unequal)||It can have up to 5 axes
|hexagon||6 sides (can be equal or unequal)||6 angles (can be equal or unequal)||It can have up to 6 axes of
|Octagon||8 sides (can be equal or unequal)||8 angles (can be equal or unequal)||It 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
|It can have a line of
Learn more about geometrical shapes with us and download BYJU’S – The Learning App to get personalized video content which will interactively explain the concepts of geometry.