Advertisements
Advertisements
प्रश्न
Formula used to find the circumference of a circle is
पर्याय
2πr units
πr2 + 2r units
πr2 sq.units
πr3 cu.units
Advertisements
उत्तर
Formula used to find the circumference of a circle is 2πr units
APPEARS IN
संबंधित प्रश्न
In Figure , two concentric circles with centre O, have radii 21cm and 42 cm. If ∠ AOB = 60°, find the area of the shaded region. [use π=22/7]
In Fig. 9, is shown a sector OAP of a circle with centre O, containing ∠θ. AB is perpendicular to the radius OQ and meets OP produced at B. Prove that the perimeter of shaded region is
`r[tantheta+sectheta+(pitheta)/180-1]`
Find the circumference of a circle whose area is 301.84 cm2.
A chord of a circle of radius 30 cm makes an angle of 60° at the centre of the circle. Find the areas of the minor major segments.
Find the area and perimeter of the following semi-circle :
Diameter= 5.6 cm
A wheel has a diameter of 84 cm. Find how many completer revolutions must it make to cover 3.168 km.
The circumference of a circle is 440 cm. Find its radius and diameter. (Take π = `22/7`)
In the adjoining figure, the crescent is formed by two circles which touch at the point A. O is the centre of bigger circle. If CB = 9 cm and DE = 5 cm, find the area of the shaded portion.
Find the area of a circular field that has a circumference of 396m.
The area of a square is 100 cm2. The circumference (in cm) of the largest circle cut of it is ______.
