About this Tutorial:
Find How to Calculate Area, Radius, Diameter, Circumference of Circle with known single value of a circle
How to calculate, If you know a circle has an Area (A) of 19.6 square units, you can calculate Radius (r), Diameter (D), and Circumference (C) as follows:
Radius (r) = √ (A ÷ π)
Radius (r) = √ (19.6 ÷ 3.14159)
Radius (r) = √ (6.238879038957981)
Radius (r) = 2.4977737626138796
Circumference (C) = π * (r * 2)
Circumference (C) = 3.14159 * (2.4977737626138796 * 2)
Circumference (C) = 3.14159 * (4.995547525227759)
Circumference (C) = 15.6939754059142
Diameter (D) = r * 2
Diameter (D) = 2.4977737626138796 * 2
Diameter (D) = 4.995547525227759
How to calculate, If you know a circle has a Circumference (C) of 15.7, you can calculate Area (A), Diameter (D), and Radius (r) as follows:
Diameter (D) = C ÷ π
Diameter (D) = 15.7 ÷ 3.14159
Diameter (D) = 4.997465213085514
Radius (r) = D ÷ 2
Radius (r) = 4.997465213085514 ÷ 2
Radius (r) = 2.498732606542757
Area (A) = π * r * r;
Area (A) = 3.14159 * 2.498732606542757 * 2.498732606542757
Area (A) = 7.84999336938866 * 2.498732606542757
Area (A) = 19.61505096136064 square units
How to calculate, If you know a circle has a Diameter (D) of 6, you can calculate Area (A), Circumference (C), and Radius (r) as follows:
Radius (r) = D ÷ 2
Radius (r) = 6 ÷ 2
Radius (r) = 3
Circumference (C) = π * (r * 2)
Circumference (C) = 3.14159 * (3 * 2)
Circumference (C) = 3.14159 * (6)
Circumference (C) = 18.84955592153876
Area (A) = π * r * r;
Area (A) = 3.14159 * 3 * 3
Area (A) = 9.424769999999999 * 3
Area (A) = 28.274333882308138 square units
How to calculate, If you know a circle has a Radius (r) of 4, you can calculate Area (A), Diameter (D), and Circumference (C), as follows:
Diameter (D) = r * 2
Diameter (D) = 4 * 2
Diameter (D) = 8
Circumference (C) = π * (r * 2)
Circumference (C) = 3.14159 * (4 * 2)
Circumference (C) = 3.14159 * (8)
Circumference (C) = 25.132741228718345
Area (A) = π * r * r;
Area (A) = 3.14159 * 4 * 4
Area (A) = 12.56636 * 4
Area (A) = 50.26548245743669 square units
