In geometry, 2-D shapes are completely flat and have only two dimensions – length and width. They do not have any thickness and can be measured only by the two dimensions. There are different types of 2-D shapes, which are open figures and closed figures.
Open and Closed Figures
Open figures do not begin and end at the same point.
Closed figures begin and end and the same point.
In our surroundings, we could see some different types of closed figures commonly. Here we discuss some of these closed figures.
These are triangles, squares, rectangles and circles.
Triangle:A triangle is a 2D shape with three sides and three corners.
Traffic signs, pizza, sandwiches etc are in the shape of a triangle.
Rectangle:A rectangle is a 2D shape with four sides and four corners.
A blackboard, door, brick etc are in the shape of a rectangle.
Square:A square is a 2-D shape with four sides and four corners. All sides of squares are equal.
The chessboard, bread etc are in the shape of a square.
Circle:A circle is a closed 2-D shape made up of a curved line with no sides and no corners. A circle has various parts like centre, radius, diameter, circumference, and so on.
In real life coins, plates, pizza, etc. are examples of the circle.