Measurement

Introduction:

                Measurement is the branch of Mathematics which deals with the measure of lengths,angles,areas,perimeters in plane figures and surface areas,volumes in solid figures.

Area:

         Area is the portion inside the closed figure in a plane surface.

Perimeter:

           The perimeter of a closed figure is the total measure of the boundary.

Formulae:

        Circle:

                                  Area   A = ℼ r² sq.units.                        
                                       Perimeter   P = 2ℼr units.



 
Semicircle:

             Area   A = ½ ℼ r² sq.units.
             Perimeter   P = ( ℼ + 2 ) r units.




Quadrant of a circle:

         
   Area   A = ¼ ℼ r² sq.units.                 
       
  Perimeter   P = (  ½ ℼ + 2 ) r units.
             

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