Circumference is pi * r * 2. Area is pi * r2. In your circle, both r * 2 and r2 equal 4. Your radius is 2 inches.
If the circumference of the circle is 4 inches then the radius = 4/(2*pi) = 0.6366197724 inches And the area of the circle = pi*0.63661977242 = 1.273239545 or about 1.273 square inches
The area of a circle is the number pi (3.14159...) times the square of the radius. The radius is half the diameter. So if the diameter is 8 inches, the radius is 4 inches. Squaring that gives us 4 x 4, or 16 square inches. Multiplying 16 by pi equals an area slightly larger than 50.26 square inches.
8 inches; the diameter of a circle is twice its radius.
Area of circle: pi times 2 squared = 4*pi square inches
The area would be 50.3 square inches.
If the radius of a circle is four inches the diameter, circumference and area are:Diameter = 8 inchesCircumference = 25.13 inchesArea = 50.27 square inches
Area of circle in square inches = pi*radius squared
50.26548246 Inches 127.6743254 Centimetres
Circumference is pi * r * 2. Area is pi * r2. In your circle, both r * 2 and r2 equal 4. Your radius is 2 inches.
If the circumference of the circle is 4 inches then the radius = 4/(2*pi) = 0.6366197724 inches And the area of the circle = pi*0.63661977242 = 1.273239545 or about 1.273 square inches
The area of a circle is the number pi (3.14159...) times the square of the radius. The radius is half the diameter. So if the diameter is 8 inches, the radius is 4 inches. Squaring that gives us 4 x 4, or 16 square inches. Multiplying 16 by pi equals an area slightly larger than 50.26 square inches.
Radius of circle: square root of (113.04/pi) = 5.9985 inches rounded to 4 decimal places
8 inches; the diameter of a circle is twice its radius.
Area of circle: pi times 2 squared = 4*pi square inches
That would be 1/4 of the area of the entire circle. pi * r^2/4 (or πr2/4). Area of a circle = pi*62 = 113.0973355 or about 113 square inches, which, when divided by 4, gives you 28.25 square inches.
diameter = 8 inches so the radius will = 4 inches area of a circle = pi*radius2 area = 50.26548246 or 50 square inches to the nearest square inch.