Class 7 CBSE Perimeter and Area - Parallelogram, Triangle & Circle

About This Chapter

Extend your knowledge of mensuration. Learn to calculate area of parallelograms and triangles using base and height, and discover the formulas for circumference and area of circles.

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Chapter Sections

1

Introduction

Review of perimeter and area concepts.
2

Area of a Parallelogram

Area = base × height.

ParallelogramBase × Height
3

Area of a Triangle

Area = ½ × base × height.

TriangleHalf Base Height
4

Circles

Circumference = 2πr.

CircumferencePiRadius
5

Area of Circle

Area = πr².

Areaπr²
6

Exercise 9.1

Practice problems.
7

Exercise 9.2

Practice problems.
8

What Have We Discussed?

Chapter summary.
9

Extra Curriculum Support

Additional resources.