The world comprises of many things. Some are tangible while others are intangible, which can only be imagined. It is here the visualization aspect of geometry is reckoned.Â Thinking analytically, geometry originated as a practical science, concerned with surveying, measurements, areas and volumes. The practical significance of geometry can be understood when you see the world around you – from the lofty manmade bridges to hitting the ball in a billiards game. The importance of geometry in this modern era cannot be undermined. Itâ€™s interesting to know that the mighty pillar of geometry rests on the simple but important ideas like point, line, plane, and space respectively.
Notice how to write the symbol for this line. The arrowheads on line AB show us that the line extends endlessly in both directions.
Intersecting line: When two lines meet at a point, they are called “intersecting lines.” In the above diagram both the lines CD and AB meet at point F.
Co-linear Points: Three or more points in a plane are said to be co-linear if they all lie on the same line, this line is the â€œline of co-linearity.â€ In the above diagram Points A B and C are co-linear but Point D in non co-linear.
Concurrent Lines: Three or more lines in a plane are concurrent if all of them pass through the same point. The point of intersection is called the point of concurrence. In the above diagram AB, CD and EF are concurrent lines where G is the point of concurrence.
Test your knowledge – try this Geometry Test.