A circle with centre O has radius r cm. A sector of the circle, which has an angle of radians…
A circle with centre O has radius r cm. A sector of the circle, which has an angle of radians…
A circle with centre O has radius r cm. A sector of the circle, which has an angle of radians at O, has perimeter 6 cm show that θ=6/r-2 and express the area of the sector in terms of r.
