what is an angle? #angle

we often use the term ' angle ' in trigonometry, geometry etc. 'Angle' plays an important role in
mathematics. Everybody know angle30, angle 60,angle 15...etc.

  But the definitition of angle is disappear. Now we see what is angle?👇

                                 " ANGLE IS THE AMOUNT OF TURN OF A RAY FROM THE HORIZONTAL 
                                    LINE "


                                      
              The positions of rays at various angles are shown below

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