If the area of circle is 144cm², then the area of its quadrant is ________

Area of a semi circle is

A polygon in which at least one angle is more than 180^o is called a ___________

If radius of a circle is r units; then its perimeter is 

The number of quadrants in a circle is

Central angle of the quadrant is

If  length of a rectangle is 8cm and its area is 56cm² , then the breadth is      

The two diagonals of a rhombus are 10cm and 12cm then its area is.

Quadrant of a circle is __________ of the circle.