Sub. :- Mathematics Std. :- 6 th Chapter no. 5

If we look around us, we will see angles everywhere. Angles In Daily Life

What is an Angle? AAn angle is the figure formed by two rays sharing a common endpoint. TThe common endpoint is called as Vertex. TThe word angle comes from the Latin word angulus, meaning "a corner".

AAn angle is the figure formed by two rays sharing a common endpoint. TThe common endpoint is called as Vertex. TThe word angle comes from the Latin word angulus, meaning "a corner".

Elements of an Angle AAbove figure shows an angle. RRays BA and BC having common endpoint B. TThe rays BA and BC are called as arms of an angle.

Name of an Angle NName of an Angle can be written by using three capital letters, as angle ABC or CBA. TThe letter naming the vertex of an angle is always written in the middle. It can be read as ‘angle ABC’ or ‘angle CBA’. NName of an angle also can be written by using a single letter, as angle B. TThe sign to denote an angle is ‘<’.

Types of Angles Right Angle Acute Angle Obtuse Angle

There are three main types of angles. Right angle Acute angle Obtuse angle A B C A B C A B C Types Of Angles

     V    Which of the angles below is a right angle, less than a right angle and greater than a right angle? Right angle Greater than a right angle Less than a right angle   

An angle divides the points on the plane into three regions: A B C F R P T X Interior And Exterior Of An Angle Points lying on the angle (An angle) Points within the angle (Its interior portion. ) Points outside the angle (Its exterior portion. )

Exercise :- Complete the following table A B C F U W P X Interior And Exterior Of An Angle Points on angle Points in interior of angle Points in exterior of angle