The chapter “Geometrical Shapes” is Chapter 5 from Merry Math III for students of Class 3rd of JKBOSE. In a previous post, you read about Time Goes On Answers Page No 65 to Page No 70. The particular post is about Geometrical Shapes Page No 71 to Page No 76 Let’s get started:
Geometrical Shapes Page No 71 to Page No 76
When we look around us, we see a variety of shapes in objects. Some of the objects are shaped like :
When we look at the faces of these shapes, we find that some are flat and some are curved.
All the faces of a cuboid or a cube are flat. With the help of a flat face of the above shapes, we can draw, on a piece of paper, the following 2-dimensional shapes, called basic shapes.
These basic shapes are available and can be seen both inside and outside the school.
Description of Shapes
Before children are asked to select appropriate objects and draw basic shapes using objects, it is necessary that children know the description of these shapes.
It is a square which has four equal sides.
It is a rectangle whose opposite sides are of equal lengths.
It is a triangle which has three sides.
It is a circle.
Straight and Curved Lines
By moving a pencil along an edge of a die, a match-box, a set-square, a ruler, we get a straight line. Children should be asked to move their pencils along the edges of cuboidal objects. Similarly, by moving a pencil along a curved edge of a tin, a carom-coin, a rupee coin, etc., we get a curved line. Children should be asked to move their pencils along a curved edge of cylindrical or conical objects.
Note: At this stage, there is no need to make any distinction between a straight line and a line-segment.
Recognition of basic shapes
In previous class you have studied about four basic geometrical shapes, namely a square, a rectangle, a triangle and a circle.
Page No. 75 – 76 Answers.
Q.1. Colour the following shapes in the pictures as indicated:
Q.2. In the picture, colour:
Q.3. In the picture, count the number of each given shape and write in the box:
Description of basic shapes
This is a square It has four sides and four corners. Side All its sides are of the same length. corner square This shape can be obtained when we put a die on a piece of paper and move a pencil along the edges of the bottom face:
This is a rectangle. It has four sides and four corners. Its opposite sides are of the same length. Corner Keeping a match on a piece of paper, we can obtain a rectangle if we move all along the edges of the bottom face.
This is a triangle
It has three sides and three vertices.
The three sides of a triangle may or may not be of the same length.
The following figures are also triangles.
This is a circle
It has no corners.
This shape can be traced with a bangle, a one-rupee coin, a carom coin, etc.
That’s all about Geometrical Shapes Page No 71 to Page No 76. Hope it has helped. Do share your views about this post in the comment section below.