# Surface area and volume of a cube

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Cube is introduced and analysed to calculate the surface area.

### Objectives

Understand surface area of a cube

Understand volume of a cube

### Estimated Time

15 minutes.

### Prerequisites/Instructions, prior preparations, if any

- Cube and its properties should have been done.
- Formula to find the area of a square.

### Materials/ Resources needed

Laptop, geogebra file, projector and a pointer.

Geogebra file: Cube , Surface area of a cube

Download this geogebra file from this link.

Download this geogebra file from this link.

### Process (How to do the activity)

- Project the geogebra file that would enable the students to visualise an opened cube.
- Ask the following questions.

- Developmental Questions:

- What is the formula to find the area of a square ?
- What does the term 'area' mean ?
- What is the meaning of total surface area ?
- How many squares are there totally in a cube ?
- Therefore what is the total surface area of a cube.?
- What does the term 'lateral' mean ?
- What is lateral surface area ?
- How many squares are there in a lateral surface of a cube ?
- Hence what is the formula to find the lateral surface area of a cube ?
- What does the term 'volume'mean ?
- What is the formula for volume in general?
- What is the formula for volume of cube ?

- Evaluation

- Were the students able to comprehend the difference between area and volume ?
- Were they able to understand the distinction between the lateral surface area and total surface area ?

- Question Corner:

- What is the formula to find the area for a cuboid cantainer with no lid and with lid ?
- Give some examples of objects which are cuboidal in shape.