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In geometry, a cube is a three-dimensional solid 
object. 
. 
It has six square faces, or sides, with three 
meeting at ...
SHAPE OF A CUBE
 Let the length of one side of cube be ‘a’ 
a 
a 
a
It is easy to see that the cube has six sides and 
each side is a square.
The area of one square is a × a = a2 
Since there are six sides, the total surface 
area, call it SA is: 
SA = a2 + a2 +...
Q1) Find the surface area if the length of one 
side is 3 cm 
Side=3 cm 
Surface area = 6 × a2 
Surface area = 6 × 32 
Sur...
Q2) Find the surface area if the length of one 
side is 5 cm 
Side=5 cm 
Surface area = 6 × a2 
Surface area = 6 × 52 
Sur...
Q3) Find the surface area if the length of one 
side is 1/2 cm 
Side=1/2 cm 
Surface area = 6 × a2 
Surface area = 6 × (1/...
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  1. 1. In geometry, a cube is a three-dimensional solid object. . It has six square faces, or sides, with three meeting at each vertex.  All vertices are 90 degrees.
  2. 2. SHAPE OF A CUBE
  3. 3.  Let the length of one side of cube be ‘a’ a a a
  4. 4. It is easy to see that the cube has six sides and each side is a square.
  5. 5. The area of one square is a × a = a2 Since there are six sides, the total surface area, call it SA is: SA = a2 + a2 + a2 + a2 + a2 + a2 SA = 6 × a2 Therefore, the area of cube is 6a2
  6. 6. Q1) Find the surface area if the length of one side is 3 cm Side=3 cm Surface area = 6 × a2 Surface area = 6 × 32 Surface area = 6 × 3 × 3 Surface area = 54 cm2
  7. 7. Q2) Find the surface area if the length of one side is 5 cm Side=5 cm Surface area = 6 × a2 Surface area = 6 × 52 Surface area = 6 × 5 × 5 Surface area = 150 cm2
  8. 8. Q3) Find the surface area if the length of one side is 1/2 cm Side=1/2 cm Surface area = 6 × a2 Surface area = 6 × (1/2)2 Surface area = 6 × 1/2 × 1/2 Surface area = 6 × 1/4 Surface area = 6/4 cm2 Surface area = 3/2 cm2 Surface area = 1.5 cm2

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