Introduction of Linear Pair#!#Vertically opposite angles#!#Ex-5.1

Vertically opposite angles are always

Indicate which pairs of angles are: (i) Vertically opposite angles.(ii) Linear pairs.

Draw lines PQ and RS intersecting at point O. Measure a pair of vertically opposite angles. Bisect them. Are the bisecting rays forming a straight line ?

Prove that vertically opposite angles are equal.

Question Practice|Vertically Opposite Angles|OMR

In Fig.15, write down: (i) each linear pair (ii) each pair of vertically opposite angles.

VERTICALIY OPPOSITE ANGLES Two angles formed by two intersecting lines having no common arm are called vertically opposite angles.

Introduction to Linear Equations in Two Variables

Some Basic Definitions|Types Of Angles|Complementary And Supplementary Angles|Adjacent Angles|Linear Pair Of Angles|Vertically Opposite Angles|Axioms

Some Basic Definitions|Types Of Angles|Adjacent Angles|Complementary And Supplementary Angles|Linear Pair Of Angles|Vertically Opposite Angles|Axioms