The amount of surface occupied by an object or a place is called its 

S.I unit of area is 

C.G.S unit of area is 

Area of circle of radius r = 

$1m^2=1\; \backslash ,m^2\; =$ _____ $c{m}^2\mathrm{.}cm^2.$

$1c{m}^2=1\; \backslash ,cm\; ^2\; =$ _____ $m^2\mathrm{.}m^2.$

1 hectare = 

Area of square of side = 

Area of rectangle = 

Area of triangle =