Which of the following expresses the circumference of a circle inscribed in a sector `O A B` with radius `Ra n dA B=2a ?` (a)`2pi(R a)/(R+a)` (b) `(2piR^2)/a` `2pi(r-a)^2` (d) `2piR/(R-a)`

Which of the following expresses the circumference of a circle inscribed in a sector. OAB with radius R and AB = 2a ?

Which of the following expresses the circumference of a circle inscribed in a sector O A B with radius Ra n dA B=2a ? (a) 2pi(R a)/(R+a) (b) (2piR^2)/a (c) 2pi(r-a)^2 (d) 2piR/(R-a)

Which of the following expresses the circumference of a circle inscribed in a sector O A B with radius Ra n dA B=2a ? (a) 2pi(R a)/(R+a) (b) (2piR^2)/a (c) 2pi(r-a)^2 (d) 2piR/(R-a)

Which of the following expresses the circumference of a circle inscribed in a sector O A B with radius Ra n dA B=2a ? 2pi(R a)/(R+a) (b) (2piR^2)/a 2pi(r-a)^2 (d) 2piR/(R-a)

Which of the following expresses the circumference of a circle inscribed in a sector OAB with radius RandAB=2a?(a)2 pi(Ra)/(R+a) (b) (2 pi R^(2))/(a)2 pi(r-a)^(2)(d)2 pi(R)/(R-a)

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

Circumference of a circle with radius r will be 2pir . (True/ false)

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

The locus of the mid-points of the chords of the circle of lines radiùs r which subtend an angle pi/4 at any point on the circumference of the circle is a concentric circle with radius equal to (a) (r)/(2) (b) (2r)/(3) (c) (r )/(sqrt(2)) (d) (r )/(sqrt(3))

The locus of the mid-points of the chords of the circle of lines radiùs r which subtend an angle pi/4 at any point on the circumference of the circle is a concentric circle with radius equal to (a) (r)/(2) (b) (2r)/(3) (c) (r )/(sqrt(2)) (d) (r )/(sqrt(3))