1. Classroom interaction procedure Response
Introduction
Teacher shows different types of shapes
And asking about the characteristics of these
shapes.
Activity 1 : Teacher shows the model of
rectangular prism and discuss the characteristics
Presentation
Activity 2 : Teacher shows the following figure
l
B l
H h
b
L
Teacher asking students to find the
measurement to stick the colour paper
around the rectangular prism
the length of the rectangular prism is l breadth is
b and height is h then the surface area is
2(lb+bh+lh)
Teacher giving notes and showing chart
Surface area of rectangular prism
The lenghth of the rectangular prism is l breadth
b height h then the surface area is 2(lb+bh+lh)
Students finds the answers
Students find the measurement is surface area

2. APPLICATION
The length of the rectangular prism is 24cm
breadth is 15cm and height is 32cm.find out the
Surface area?
What you want to find?
Which are the terms given here?
Formula for finding the surface area?
the surface area is?
REVIEW
1. What is rectangular prism?
2. What is the formula for finding the surface area?
FOLLOW UP ACTIVITIES
The length of the rectangular prism is 37cm,breadth is 23cm, height is 58.Find out the
surface area?
unit?
The surface area is
Surface area
L=24cm b=15cm h=32cm
Surface area is =2(lb+bh+hl)
2(lb+bh+hl)=2(24*15+15*32+32*24)
=2(360+480+768)
=2*1608
=3216
Cm^2
Surface area=3215 cm^2