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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 Triangle ♦ Transversal ♦ Exterior Angles ♦ Quadrilateral ♦ Linear Pair Axiom
Table of Contents Chapter 4) Lines and Angles
  4.1) Introduction
4.2) Basic Terms in Geometry
  4.2.1) Intersecting Lines and Non-Intersecting Lines
  4.2.2) Concurrent Lines
4.3) Pairs of Angles
  4.3.1) Linear Pair of Angles Axiom
  4.3.2) Angles in Intersecting Lines
4.4) Lines and a Transversal
  4.4.1) Lines Parallel to the Same Line
  4.5) Angle Sum Property of a Triangle
Description This is the third chapter namely “Lines and Angles” of book entitled “Mathematics: class 9”. This chapter deals with Lines and Angles. The notion of line or straight line was introduced by ancient mathematicians to represent straight objects (i.e., having no curvature) with negligible width and depth. Lines are an idealization of such objects. In planar geometry, an angle is the figure formed by two rays, called the sides of the angle, sharing a common endpoint, called the vertex of the angle. Angles formed by two rays lie in a plane, but this plane does not have to be a Euclidean plane. Angles are also formed by the intersection of two planes in Euclidean and other spaces. It includes some exercises and problems 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) 552.99 kB
Page Count 36


Source: SCERT Andhra Pradesh