The first step is to work out the radius. The formula for area is pi(r2). That equals 379.94, so plug this into the equation and you get a radius of 10.997. The formula for the circumference is pi(2r). Plug the now known radius in and you get 69.097516968554117299881726353374
Therefore the circumference, if the area is 379.94cm2, will be 69.1cm
The circumference is 56.55 cm
radius = 22/(2*pi) = 3.501408748 Surface area = 4*pi*3.5014087482 = 154.0619849 square cm
The area of square is : 39.69
Taking pi as 3.14:- Radius: 27.6/(2*3.14) = 690/157 cm Area of circle: 3.14*(690/157) squared = 60.65 square cm rounded to 2 decimal places
Circumference = 27 cm So radius, r = 27/Pi = 4.297183 cm Then surface area = 4*Pi*r2 = 232.05 cm2
The circumference is 51.125 cm.
circumference = pi*18 cm area = pi*92 square cm
Its circumference is: 15*pi cm Its area is: pi*7.5^2 square cm
Area = pi*72 square cm Circumference = pi*14 cm
The circumference is 56.55 cm
The circumference is 42.538 cm
Area = pi*2.52 = 19.63495408 or about 20 square cm Circumference = pi*5 = 15.70796327 or about 16 cm
12.563 centimetres.
radius = 120/(2*pi) = 19.09859317 cm area = pi*19.098593172 = 1145.91559 or about 1146 square cm
Radius = 4.998732446 Circumference = 2*pi*4.998732446 = 31.40796226 cm
Radius of circle: square root of (324/pi) = 10.1554125 cm Circumference of circle: 2*pi*10.1554125 = 63.80833861 or 64 cm to the nearest integer
Providing that its diameter is 12 cm then:- circumference = pi*12 = 37.699 cm to 3 decimal places area = pi*6 squared = 113.097 square cm to 3 decimal places