Advertisements
Advertisements
प्रश्न
Ratio of the circumference of a circle to its diameter is denoted by symbol ______.
Advertisements
उत्तर
Ratio of the circumference of a circle to its diameter is denoted by symbol π.
Explanation:
∵ Circumference = 2 πr
⇒ C = πd ...[∵ d = 2r]
⇒ `C/d = π`
⇒ π = C : d
Hence, π is the answer.
APPEARS IN
संबंधित प्रश्न
In the given figure, the side of square is 28 cm and radius of each circle is half of the length of the side of the square where O and O' are centres of the circles. Find the area of shaded region.
Shazli took a wire of length 44 cm and bent it into the shape of a circle. Find the radius of that circle. Also find its area. If the same wire is bent into the shape of a square, what will be the length of each of its sides? Which figure encloses more area, the circle or the square? (Take `pi = 22/7`)
In the given figure, the shape of the top of a table is that of a sector of a circle with centre O and ∠AOB = 90°. If AO = OB = 42 cm,· then find the perimeter of the top of the table.
In a circle of radius 21 cm, an arc subtends an angle of 60° at the centre. The length of the arc is
A 4.2 m wide road surrounds a circular plot whose circumference is 176 m. Find the cost of paving the road at Rs 75 m 2.
A cart wheel makes 9 revolutions per second. If the diameter of the wheel is 42 cm, find its speed in km/hr.
The circumferences of two circles are in the ratio 5: 7, find the ratio between their radius.
Find the area and perimeter of the following semicircles: Diameter = 7cm
Find the circumference of a circle whose area is 81πcm2.
In a circle of diameter 42 cm, if an arc subtends an angle of 60° at the centre, where `pi = 22/7` then length of an arc is ____________.
