A square is made inside the circle. Find the area of that portion of the circle which is not inside the square, if the radius of the circle is 10 cm. (`pi` = 3.14 )

Find the area of the semi-portion of the circle x^2+y^2=4

Find the area of a circle of radius 30 cm (use pi = 3.14)

A square of side 3 cm is inscribed in a circle. Find the area of the shaded portion.

Area of an equilateral triangle is 17300 cm^2 . By taking each vertex of the triangle as centre, a circle is drawn at each vertex. The radius of thecircleis half of the length of the side of an equilateral triangle. Find the area of that portion of the triangle which is not included in the circle. (pi=3.14 and sqrt3=1.73 )

The radius of the circle is 14 m. Find the radius of another circle whose area is one. fourth of the area of pervious circle.

Find the area of sector of a circle with radius 6 cm, if angle of the sector is 60^@ .