Making 3D Shapes from Nets: 5th Grade Geometry Term 1

Geometry | Term 1 Chapter 1 | 5th Maths

make the shapes of cubes, cylinders and cones using nets

Unit 1 : Geometry

Able to make the shapes of cubes, cylinders and cones using nets especially designed for this purpose.

Nets of cuboid:

Open out a match box and layout on the white paper. Draw the base sides of the match box.

Teacher: Do you see, “How many sides are there in a match box?”

Student: yes sir. There are 6 sides.

Teacher: You are right. Can you assemble/create it after dissemble?

Student: Yes sir.

Teacher: Good

The net is a two dimensional shape and it always forms three-dimensional shape.

A net is a two dimensional figure which can be folded to form a three dimensional figure.

Try these

Find out which of these can be made into a box by folding along the dotted lines. Put a tick mark for the correct option.

Think First: Look at the patterns above. Imagine folding them along the dotted lines in your mind. Which ones will perfectly close to form a box?

Net of a cube:

Fold squares along the dotted lines. Hence six equal squares from the net of a cube.

Net of a cylinder:

Consider a rectangle and two equal circles. This net thus formed is a cylinder.

Join the two edges of a rectangle breadth wise in such a way that the length of the rectangle forms the boundary of one circle at the top and other circle at the bottom.

            The length of the rectangle forms the boundary of the circle. Both of them are equal in length.
        

Net of a cone:

Look at the figure.

Join both the portion of a circle in such way that the arc of the circle falls on the boundary of the circle attached at the bottom.

            The length of the arc forms the boundary of the circle. Both of them are equal in length.
        

Activity

Match the net with the shape you will get by folding.

Exercise: Below are various nets and 3D shapes. Can you pair each net with its corresponding 3D object?

Making 3D Shapes from Nets: 5th Grade Geometry Term 1 Unit 1