If the radius of a circle is 7m, then the area of the semi circle is

Quadrant of a circle is __________ of the circle.

Area of a semi circle is

If the area of a semicircle is 84cm² , then the area of the circle is _________

The perimeter of the quadrant of a circle of diameter 84cm is

Central angle of the quadrant is

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

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