13
1. Take a hollow cuboidal box of cardboard and cut it along its edges carefully to prepare a net of cuboid as
HO
Activity 2
To find the surface area of a cuboid.
Materials required: a hollow rectangular box of cardboard, pair of scissors, and geometry box
Steps:
shown in figure.
2. Write the dimension of each side.
3. We know that a cuboid has three pairs of identical faces.
4. Find the surface area of all faces of the box.
Chapter at a
Negative
1
11
4" is cal
Laws
2
b
a is ar
1. a
b
Top
2.
Back side
1
h
b
Left
side
h
Right
side
b
Bottom
3.
h
Front side
4.
Result:
There are two faces (top and bottom) each with area = 1 x b units?
There are two faces (front and back) each with area = 1x h units?
here are two faces (right and left) each with area = b x h units?
herefore, the surface area of the cuboid = sum of areas of all six faces = 2(lb + bh + hl)
urface area of the cuboid = 2(lb + bh+ hl)
Answers
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Answer:
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