Solid Shapes
We will discuss about basic solid shapes. We see a variety of solid objects in our surroundings.
We know these objects. If we move them, lift them and touch them, they remain the same.
Objects around us, which do not change their shape easily, are called SOLIDS.
All these objects need space for storing them. We also call them ThreeDimensional (3D) Shapes.
Look around and name the solids you see near you.
Solid objects have one or more shapes like the following.
1. Match the objects with similar shape.
We, now study some important solid shapes.
Solid Shapes:

This is a cube. A cube has 6 square faces. It has 12 edges.
It has 8 corners.


This is a cuboid. A cuboid has 6 rectangular faces. It has 12 edges.
It has 8 corners.


This is a cone. A cone has 1 flat face and a curved face.
Cone has 1 corner.


This is a cylinder. A cylinder has 2 flat faces. It has 1 curved face.
It has no corners.


This is a sphere. Sphere has no flat faces. Sphere has only a curved face.
Sphere has no corners.

Solid shapes are fat but not flat like a sheet of paper.
This football is fat but not flat. So, it is a solid shape or a 3D shape. This circle is flat. So, this is not a solid shape.


This circle is flat. So, this is not a solid shape.


A Cone is like a party hat or icecream.


A Sphere is like a bouncy ball.


A Cuboid is like this building.


A Cylinder is like a can.


A Cube is like a playing dice.


Let us learn
All shapes like a cuboid are called cuboidal shapes.
All shapes like a cylinder are called cylindrical shapes.
All shapes like a cone are called conical shapes.
All shapes like a sphere are called spherical shapes.
All shapes like a cube are called cubical shapes.
2. Match the shapes with their properties.
(i)

I am a solid shape. I have two flat faces.
I have one curved face.

(a)


(ii)

I am a plane shape. I have one curved side.
I have no corners.

(b)


(iii)

I am a solid shape. I have six sides.
All my sides are equal in length.

(c)


(iv)

I am a plane shape. I have four sides and four corners.
My two opposite sides are equal.

(d)


(v)

I am a solid shape. I have one flat face and a curved face.
I have one corner.

(e)


Basic Difference Between Cube and Cuboid:


Front, Back, Top and Bottom  4 faces are same of one type. Left End, Right End  2 same faces but different from other 4 faces.

It has 6 faces. All six are of same type.

3. Write T for true and F for false statements.
(i) A cuboid has six faces.
(ii) A sphere has one face and one corner.
(iii) A carrot is cylindrical in shape.
(iv) A cylinder has three faces.
(v) A shuttlecock looks like a cone.
(vi) Every solid has at least one face.
(vii) Both a cylinder and a cone have three faces.
Answer:
3. (i) T
(ii) F
(iii) F
(iv) F
(v) T
(vi) T
(vii) F
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