75.39816
12
circumference = diameter x pi = 12 units x 3.1416 = 37.7 units (approx)
Circumference = pi x diameter. So the circumference of a circle with diameter 12 cm = pi x 12 = 37.7 cm (1 decimal place.)
The formula for working out the circumference is 2pi x radius, aka pi diameter. The radius is 6 so times this by 2 and then pi. The answer would be: (6 x 2) x pi = 12 x pi = 37.69911184. Pay attention in maths lessons next time! ;) Hope this helps.
(12 x "pi" x 20) + 2(36 x "pi") which equals 314 x "pi" which equals about 985.96 when pi is 3.14
2 x pi x 12 in, ie 24 pi inches
The circumference C is equal to [2 x pi x radius] or [pi x diameter]In the example, the circumference is 12 pi = 12 x 3.1416 = about 38 feet (37.70 feet)
Area of a circle = Pi times r^2. r=12 A = pi x (12^2)= pi x 144 equals approximately 452.3893421
Use the equation...... x/360 times (pi) times (diameter) Where x is your degrees. 30/360 (pi)(12) 1/12 (pi)(12) = 1 pi
75.39816
12inch x Pi
circ = pi x diameter = pi x 4 sqqrt(3) so radius = 2 x sqrrt(3) and radius squared = 12 so area = pi radius squared = 12 pi
Circumference = pi x the diameter of the circle C = pi (12 inches) So C = 3.14159 X 12 C =37.69906 (approx)
The formula is pi (3.14) x radius x radius 3.14 x 12 x 12 = 446.4
12 units x pi = 37.7 units
A = Pi x r2 = Pi·62 ≈ 113.1 units2