The diameter of any circle, including that one, is double (two times) its radius.
5
8.5
17
It is 17/2 = 8.5 cm.
circumference = pi * diameter C = pi * 2(17 cm) = 107 centimeters
Diameter = 17 inches Radius = 8.5 inches Are of circle = pi x r x r = 3.1415 x 8.5 x 8.5 = 226.97 square inches
17 Half the diameter
17
8.5
Diameter = 2 times the radius = (2 x 8.5) = 17 cm
17 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)
It is 17/2 = 8.5 cm.
Diameter is twice the radius, therefore 4.2cm radius = 8.4cm diameter.
Divide the diameter by 2, to get the radius. Then you can use the standard formula for the area of a circle.
The formula for the area of a circle is: A=∏r2Where A is the total area of the circle and r is its radiusThe diameter is twice the radius, so the radius in this case would be 17 feet.A=∏*(17)2A=∏*289A=289∏A equals about 907.46 feet
Circumference of a circle: 2*pi*radius or pi*diameter
d = r*2 8.5cm x 2 = 17 cm