Advertisements
Advertisements
Question
Ratio of the circumference of a circle to its diameter is denoted by symbol ______.
Advertisements
Solution
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
RELATED QUESTIONS
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]`

Figure, shows a sector of a circle, centre O, containing an angle 𝜃°. Prove that area of the shaded region is `r^2/2(tanθ - (πθ)/180^circ)`.

The parallel sides of a trapezium are 12 cm and 9 cm and the distance between them is 8 cm. Find the area of the trapezium.
A horse is placed for grazing inside a rectangular field 70 m by 52 m. It is tethered to one corner by a rope 21 m long. On how much area can it graze? How much area is left ungrazed?
Find the circumference of the circle whose area is 81π cm 2.
Find the dimensions of a rectangular park whose perimeter is 60 m and area 200 m2.
Complete the table below.
| Radius (r) | Diameter (d) | Circumference (c) |
| ...... | ...... | 616 cm |
Find the area and perimeter of the circles with following: Diameter = 77cm
The cost of fencing a circular field at the rate of Rs.250 per metre is Rs.55000. The field is to be ploughing at the rate of Rs.15 per m2. Find the cost of ploughing the field.
The diameter of the bullock cart wheel is 1.4 m. Find the distance covered by it in 150 rotations?
