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SOLIDS
GRADE 3
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Hello, How are you doing?Today, we are going to start a new lesson on
Solids.
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3-dimensional figure3-dimensional figure – A figure that has
length, width and height.
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Types of 3-dimensional figures Rectangular Prism Cylinder Cube Cone Pyramid Sphere
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3-dimensioanl figuresRectangular prism
Straight edge face
Vertex
height
length
Cube
width
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3-dimensional figuresCylinder
Curved edge
Curved face
Sphere
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3-dimensional figuresCone
Pyramid
base
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Cube and Rectangular PrismAll Cubes are Rectangular Prisms as they all
have 6 faces , 12 edges and 8 vertices.
All Rectangular Prisms are not cubes as prisms do not all have 6 faces that are equal sizes.
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Comparison of 3-dimensional figuresName Number
of curved sides
Number of flat faces
Number of edges
Number of vertices
Cube 0 6 12 8
Rectangular Prism
0 6 12 8
Sphere 1 0 0 0
Cylinder 1 2 2 0
Cone 1 1 1 1
Pyramid 0 5 8 5
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2 and 3 dimensional figures : A difference2- dimensional figures as squares only have
length and width. They do not have height.3-dimensional figures as cubes have length,
width and height.
Square cube
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What is the shape of the battery shown below?Answer- cylinder
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Name the following.a) The shape of the book – b) The shape of the earth- Answera) Rectangular prismb) sphere
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What is the shape of the given funnel shown below?
Answer- cone
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The shape of the given ball is ----.
Answer- sphere
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ASSESSMENT
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1. Name the 3-dimensional figure the given object looks like.Answer- cylinder
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2. Which has only one edge?
a) Coneb) Cylinderc) Sphered) none of these
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3. Which two 3-dimensional figures are shown in the figure below?
Answer- cone and sphere
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4. Name the 3-dimensional figures shown below.
Answer- a) cylinder b) rectangular
prism
A B
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5. Complete the table.
3-dimensional figures
Number of edges 12 2
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6. Which 3–dimensional figure is obtained on folding the figure given below?
a) Cylinderb) Conec) Cubed) Rectangular
Prism
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7. Mike traced around the bottom of the box shaped like a pyramid. What shape did he get?
Answer- square
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8. Robin uses 2 equal sized circles and 2 equal sized sticks to make a 3- dimensional figure. Name the
figure.
Answer- cylinder
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9. Choose the right name of the shape shown blow.a) Rectangular Prismb) Cubec) Pyramidd) None of the above
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10. What is the shape of the container shown below?
Answer-
Rectangular prism
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Recap 3-dimensional figure
Cube Rectangular prism Cone Cylinder Sphere Pyramid
Solved examples Unsolved examples
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Good Work!Now Practice worksheets on the lesson.
