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P. 123
Activity 3 Surface Area of Solids
Learn how to find the surface area of a solid figure
that is made of cubes. The area of each face of a cube
is 1 cm2.
What you need : Geo Cubes
Method 1 Method 2
Add all the areas of the faces that Add all the areas of the
can be seen in each layer. faces that can be seen
from the top(bottom),
layer 3: 5 front(back), and left(right).
layer 2: 7
layer 1: 12
top(bottom): 3 front(back): 6 left(right): 3
Surface area 5 7 12 (cm2) Surface area (3 6 3) 2 (cm2)
1 . Find the surface area of the solid figure that is made of cubes. Then discuss the
method used to find the surface area. The length of a cube is 1 inch.
a. b.
112
Learn how to find the surface area of a solid figure
that is made of cubes. The area of each face of a cube
is 1 cm2.
What you need : Geo Cubes
Method 1 Method 2
Add all the areas of the faces that Add all the areas of the
can be seen in each layer. faces that can be seen
from the top(bottom),
layer 3: 5 front(back), and left(right).
layer 2: 7
layer 1: 12
top(bottom): 3 front(back): 6 left(right): 3
Surface area 5 7 12 (cm2) Surface area (3 6 3) 2 (cm2)
1 . Find the surface area of the solid figure that is made of cubes. Then discuss the
method used to find the surface area. The length of a cube is 1 inch.
a. b.
112
