Here are a few important notes that should be remembered while studying 2D shapes. The following table shows the formulas that are used to calculate the area and perimeter of a few common 2D shapes: 2D ShapeĪ = π × r 2, where 'r' is the radius of the circle and 'π' is a constant whose value is taken as 22/7 or 3.14 The perimeter of a 2D shape is the total length of its boundary. The area of a 2D shape is the space enclosed within it. Observe the properties of the given rectangle ABCD to identify it as a 2D shape. Some of the real-life examples of a rectangle are table tops, blackboards, cardboard, etc. All four sides are equal, i.e., side PQ = QS = RS = PRĪ rectangle is a 2D shape with four sides in which the opposite sides are equal and parallel, and all the four angles measure 90 ̊.Observe the properties of the given square PQSR to identify it as a 2D shape. Some of the real-life examples of a square are: a loaf of bread and a chessboard. The following figure shows the sides and vertices of a triangle.Ī square is a 2 dimensional shape with four equal sides and each angle is equal to 90˚. Some real-life examples of a triangle are traffic signs, pyramids, and nachos. It is a polygon whose interior angles add up to 180°.A triangle is a closed shape with 3 sides, 3 vertices and 3 angles.Observe the properties of a triangle to identify it as a two dimensional shape. Observe the following figure to see the different parts of a circle.Ī triangle is a 2 dimensional shape with three sides and three vertices (corners). It is the longest possible line that can be drawn inside a circle and is twice the length of the radius. The diameter is a line segment that goes straight across the circle, through the center.The radius is the distance from the center of the circle to the boundary of the circle.The circumference is the length of the boundary of the circle.Circles are completely round and made up of a single curved line.Observe the properties of a circle to identify it as a two-dimensional shape. A circle consists of various parts like the radius, diameter, circumference, and so on. Some real-life examples of the circle are coins, wheels, and pizzas. Circle:Ī circle is a closed 2 Dimensional shape made up of a curved line with no corners or edges. Here is a list of 2D shapes examples along with their properties. However, a few of them are commonly seen around us and are discussed below. Let us learn about a few of them along with their properties.

There are different types of regular and irregular two dimensional shapes like a circle, triangle, square, rectangle, pentagon, and hexagon. It shows a list of 2d shapes.Ģ-D shapes are flat and can be drawn on a sheet of paper. Observe the following figure which shows the difference between regular and irregular two dimensional shapes.

A two dimensional shape (2D shape) is irregular if all the sides are of unequal length and all its angles are of unequal measures.

A 2 dimensional shape (2D shape) is said to be regular if all its sides are equal in length and all its interior angles measure the same.

Types of 2D Shapes - Regular and Irregular 2D ShapesĪ 2D shape can be classified as regular or irregular based on the length and the interior angles: The figure given below shows a list of 2D shapes that we commonly come across. 2D shapes with at least three straight sides are called polygons and these include triangles, squares, and quadrilaterals. All the 2 dimensional shapes have sides, vertices (corners), and interior angles, except for the circle, which is a curved figure. A circle, square, rectangle, and triangle are some examples of two-dimensional shapes and these shapes can be drawn on paper. 2D Shapes DefinitionĪ polygon is a 2 dimensional shape made up of straight line segments which are connected with each other, thus giving it a closed shape. Some common 3D shapes are cuboids, cones, pyramids, and cylinders. For example, a dice is three-dimensional because it consists of a length, a width, and a height. In comparison to these, a 3D (three-dimensional) shape has three dimensions - length, width, and height.

They do not have any thickness and can be measured only by the two dimensions. In geometry, 2D shapes (2 dimensional shapes) can be defined as plane figures that are completely flat and have only two dimensions - length and width.

Two dimensional shapes for 2nd grade