AREA FORMULA

                                                              AREA OF PLANE FIGURE

DEFINITION:

The area of an object is the space occupied by it on a plane surface.

FORMULAE OF PLANE FIGURE:

1)AREA OF RECTANGLE=( l*b ) sq. units

        where l is length and 

                  b is breadth

2)AREA OF SQUARE= (a*a) sq. units

         where a is the side

3)AREA OF RIGHT TRIANGLE= 1/2*(b*h) sq. units

         where b is base and 

                    h is height

4)AREA OF QUADRILATERAL=1/2*d*(h1*h2) sq. units

         where d is the length of a diagonal and

                    h1 and h2 are perpendiculars drawn to the diagonal                           from the opposite vertives

5)AREA OF PARALLELOGRAM=bh sq. units

         where b is the base and

                    h is the height

6)AREA OF RHOMBUS=1/2*(d1*d2) sq. units

         where d1 and d2 are diagonals

7)AREA OF TRAPEZIUM=1/2*h(a+b) sq.units

         where h is height and 

                    a and b are sum of the parallel sides

8)AREA OF CIRCLE=π(r*r)sq. units

         where r is the radius of the semi-circle

9)AREA OF SEMICIRCLE=π(r*r)/2 sq. units

         where r is the radius of the circle

10)AREA OF A QUADRANT=1/4*π*(r*r) sq. units

           where r is the radius