Surface area of a cuboid

Objectives

 * 1) Properties of a cuboid.
 * 2) Derivation of the formula for total surface area, lateral surface area and volume of a cuboid.
 * 3) Understand the concept of open cuboid, closed cuboid.

Estimated Time
40 minutes.

Materials/ Resources needed
Digital: Laptop, geogebra file, projector and a pointer.

Process (How to do the activity)

 * 1) Project geogebra file and let children explore a cuboid from all angles by moving the sliders.
 * 2) Ask the following questions.
 * Developmental Questions:
 * 1) What is a solid figure ?
 * 2) Name the dimensions of the cuboid.
 * 3) Recognise the face of each surface of the cuboid.
 * 4) Are all faces congruent ?
 * 5) Which of the faces are congruent ?
 * 6) What is the formula to find area of a rectangle ?
 * 7) To what is the total surface area of a cuboid equal ?
 * 8) To what is the lateral surface area of a cuboid equal to ?
 * Evaluation:
 * 1) What is the formula to find the total surface area of a cuboid ?
 * 2) What is the formula to find the lateral surface area of a cuboid ?
 * Question Corner:
 * 1) What is the area of an open cuboid ?