Surface Area Of Cube, Cuboid And Cylinder
Chapter Name : Mensuration |
Sub Topic Code : 104_08_11_06_02 |
Topic Name : Surface Area Of Cube, Cuboid And Cylinder |
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Sub Topic Name : Cube |
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Introduction
Drawing the net of a cube & then obtaining the solid model out of it. (Net of a cube means a pattern that you can cut and fold to make a model of a solid shape)
Pre-Requisites:
About different solids- namely Cube, cuboid & Cylinder and their importance
Activity:
Take a Rubik’s cube. The surface of the Rubik’s cube is embedded with cubes of different colors. Try to obtain the total surface area of each of them. Compare it with the total surface area of entire cube. Also, maintain a table having the surface areas of cubes of each color
Real Life Question:
What is the total surface area of that Rubik’s cube?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Lateral Surface Area | Area of the cube excluding the top & base |
| Total Surface Area | Total area of the cube including top & base |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Carton box with divisions | Take a large Carton box (cube shaped) with divisions. The divisions will also be in the form of cubes. If you cut them up, you will get many cubes. |
Real life uses :
A Cube is a common 3D object that one gets to see pretty often. Knowing its surface area is important for different reasons like painting, decorating, etc.
Places to visit :
Games shop, Grocery stores
Practical examples around us
| Examples | Explainations |
|---|---|
| Dice | The dice with which you play games like Snake & Ladder, Ludo etc. is in the shape of a cube |
| Frozen Cheese block | This is also a very common example of a cube. |
What you learn in Theory:
Lateral Surface Area of a cube = 4l2, Total Surface Area of a cube = 6l2
What you learn in Practice:
Cube is nothing but a cuboid, but with equal dimensions