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===Objectives===
#Properties of a cuboid.
#Derivation of the formula for total surface area, lateral surface area and volume of a cuboid.
#Understand the concept of open cuboid, closed cuboid.
===Estimated Time===
40 minutes.
===Prerequisites/Instructions, prior preparations, if any===
===Materials/ Resources needed===
Digital: Laptop, geogebra file, projector and a pointer.
===Process (How to do the activity)===
#Project geogebra file and let children explore a cuboid from all angles by moving the sliders.
#Ask the following questions.
*Developmental Questions:
#What is a solid figure ?
#Name the dimensions of the cuboid.
#Recognise the face of each surface of the cuboid.
#Are all faces congruent ?
#Which of the faces are congruent ?
#What is the formula to find area of a rectangle ?
#To what is the total surface area of a cuboid equal ?
#To what is the lateral surface area of a cuboid equal to ?
*Evaluation:
#What is the formula to find the total surface area of a cuboid ?
#What is the formula to find the lateral surface area of a cuboid ?
*Question Corner:
#What is the area of an open cuboid ?