Angles


   
 
Introduction
Geometry deals with the study of shape, size, position and other properties of objects in a plane or in space.
 
Definitions
 
Point
 
A point has position but no dimensions, no length, no breadth and no height.
 
Line
 
A line has one dimension i.e., length only. It can be extended in both directions indefinitely.
 
 
or 'l' is a line
 
Line segment
 
A line segment has fixed length, it has two end points.
 
 
Ray
 
A ray can be extended in one direction only. Its other end is a fixed point.
 
 
A plane
 
A plane has length and breadth. It has two dimensions. Any flat surface is a plane.
 
 
In our study, we deal with figures drawn on plane surfaces.
 
Axiom
 
Axiom is a statement that is accepted as true. It does not require any proof.
 
Theorem
 
Theorem is a statement that is accepted as true only after proving that it is a consequence of the axioms.
 
 
     
   
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