Area of circle with radius r = …….. `cm^(2)`

A rrarr2 then area of circle with radius r = ….. .

Assertion (A) : In a circle of radius 6 cm, the angle of a sector 60^(@) . Then area of sector is 18 (6)/(7) cm^(2) Reason (R) : Area of circle with radius r is pi r^(2)

Prove that the area of the circle with radius r is pi r^2

Area of a circle with radius r will be 2pi r (True/False)

The area of a circle varies with the square of its radius. The area of a circle having radius 3 cm is C cm^(2) . Find the area of the circle having redius 9 cm.

Choose the correct answer The rate of change of the area of a circle w.r.t its radius r at r = 6 cm is.