Page 1 - LN 2D shapes
P. 1
SAI International School
Class - III
LN: 2D Shapes
Learning objective: The students will be able to learn about different 2D shapes, their
properties and real life examples.
The plane figures that can be drawn on a flat (or plane) surface or a piece of paper. All the
2D shapes have various parameters such as area and perimeter. Some of the 2D shapes
contain sides and corners, whereas some have curved boundaries.
2D Shapes
1. Circle 4. Rectangle
2. Triangle 5. Pentagon
3. Square 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 have sides.
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 “centre”. The distance from the centre to the outer line of the circle is
called a radius. The example of the circle in real life are wheels, pizzas, orbit, etc.
Polygon
A polygon which has all the sides and angles as equal is called a regular polygon.
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.
