50* Pi
pi = 3.14159 so 157.08 to 2dp
The perimeter of a circle is equal to pi times the diameter, so for a circle with a diameter of 14 cm, multiply by pi, which is approximately 3.14, and you get 43.96 cm, which for most purposes you could round off to 44 cm.
The radius measures from the center of the circle to the perimeter (outside), so if the radius is 8.5 cm that would make the diameter of the circle 17 cm. (8.5 cm X 2 = 17 cm)
Diameter of circle: 50/pi = 16 cm rounded to the nearest whole number
Perimeter of a circle actually has a different word for it which is circumference. Since the formula for circumference is 2 pi r, it will be 34.5pi as the radius is half the diameter. *however this is in the form of pi. If pi was in 3.14, then the answer would be 106.33
The radius (radii) of a circle is 1/2 of the diameter. The radius of a circle with a 6.2 cm diameter is 3.1 cm.
Perimeter = pi*diameter = 113.1 cm
Perimeter = pi*d = 37.699 cm
In the case of a circle, it is common to call this "circumference" instead of "perimeter". Just multiply the diameter by pi.
perimeter of a circle = circumference = pi x diameter perimeter = 3.1416 x 12 = 37.7 cm
The perimeter of a circle is equal to pi times the diameter, so for a circle with a diameter of 14 cm, multiply by pi, which is approximately 3.14, and you get 43.96 cm, which for most purposes you could round off to 44 cm.
50 cm is the diameter.
Pi= 3.1416 circle / 3.1416=diameter
The radius measures from the center of the circle to the perimeter (outside), so if the radius is 8.5 cm that would make the diameter of the circle 17 cm. (8.5 cm X 2 = 17 cm)
50/PI = 15.92cm
The perimeter of a circle is calculated using the equation Pi x D = 3.14 x 5 = 15.7cm
Circumference = pi*d = 50*pi cm = 157.1 cm
The side of the square is equal to the diameter of the circle, in this case 2a so the perimeter is 8a cm.