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# Power point Presentation

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### Power point Presentation

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