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Editor Ramacharyulu, N.Ch.Pattabhi
Illustrator Soni, Prashanth
Source SCERT Andhra Pradesh
Content type Text
Publisher Government of Andhra Pradesh
File Format PDF
Copyright Year ©2013
Language English
Difficulty Level Medium
Subject Domain (in DDC) Natural sciences & mathematics ♦ Mathematics ♦ Geometry
Subject Keyword Planar Regions ♦ Rectangle ♦ Parallelograms ♦ Triangles ♦ Areas
Table of Contents Chapter 11) Areas
  11.1) Introduction
  11.2) Area of Planar Regions
  11.3) Area of Rectangle
  11.4) Figures on the Same Base and Between the Same Parallels
  11.5) Parallelograms on the Same Base and Between the Same Parallels
  11.6) Triangles on the Same Base and Between the Same Parallels
Description This is the eleveth chapter of textbook "Mathematics" for class 9. This chapter deals with "Area". This includes measuring the land, dividing it into appropriated parts and recasting boundaries of the fields for the sake of convenience. Some of these fields resemble the basic shapes such as square, rectangle trapezium, parallelograms etc., and some are in irregular shapes. For these basic shapes, we work out rules that would give the areas using a few lengths and measurements. We would study some of these in this chapter. We will learn how to calculate areas of triangles, squares, rectangles and quadrilaterals by using some formulae. We will also explore the basis of those formulae. We will discuss how are they derived ? What do we mean by ‘area’?. It includes some area related exercises, examples with solution.
Educational Role Student ♦ Teacher
Age Range 13 to 17 years
Educational Use Classroom ♦ Reading
Interactivity Type Expositive
Education Level IX and X
Learning Resource Type Book
Educational Framework Andhra Pradesh Board of Secondary Education (APBSE)
Time Required P1W2D
Publisher Date 2013
Publisher Place Hyderabad
Size (in Bytes) 0.96 MB
Page Count 16


Source: SCERT Andhra Pradesh