Introduction
Geometry deals with the study of shape, size, position and other properties of objects in a plane or in space.
Angles and Types of Angles
When two straight lines meet at a common point, they form an angle.
Theorem1
If a straight line meets another straight line, the adjacent angles so formed are supplementary.
Theorem2 (Converseof Theorem 1)
If two adjacent angles are supplementary, then their exterior arms lie in a straight line.
Summary
When a pair of angles are adjacent and also supplementary, they are said to form a linear pair.
