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6 Perimeter and Area

Learning Objectives

After studying this chapter, students will be able to... Scan to learn
 evaluate the perimeter of closed figures

 derive the formulae for the perimeter and area of rectangle, triangle and square
 understand the concept of area of closed figures.
 estimate the area of closed figures by using square grid paper
 evaluate the area of closed figures (rectangle, square and triangle)

 identify situations involving the area and perimeter of a rectangle and a square.

get ready!

Naman and Neha are very excited for shifting their class to a new classroom.

Hey! Look at our new classroom.
It seems bigger than our previous
classroom. The shape of the writing
board has also changed from a square
to a rectangle, but it looks smaller.

You are right. But to compare
the size of the classrooms and
boards, we need to find its
perimeter and area.

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