Circle

geometry. Circle

# new Circle()

Formulas related to circles.
Source:

Methods

# area(r) → {number}

Calculates the area of a circle from its radius.
Parameters:
Name Type Description
r number Radius
Source:
Returns:
πr²
Type
number
Example 
// returns 50.26548245743669
mathform.geometry.Circle.area(4);

# circumference(r) → {number}

Calculates the circumference of a circle from its radius.
Parameters:
Name Type Description
r number Radius
Source:
Returns:
2πr
Type
number
Example 
// returns 25.132741228718345
mathform.geometry.Circle.circumference(4);

# diameter(r) → {number}

Calculates the diameter of a circle from its radius.
Parameters:
Name Type Description
r number Radius
Source:
Returns:
2r
Type
number
Example 
// returns 8
mathform.geometry.Circle.diameter(4)

# radiusFromArea(A) → {number}

Calculates the radius of a circle from its area.
Parameters:
Name Type Description
A number Area
Source:
Returns:
√A⁄π
Type
number
Example 
// returns 4
mathform.geometry.Circle.radiusFromArea(50.26548245743669);

# radiusFromCircumference(C) → {number}

Calculates the radius of a circle from its circumference.
Parameters:
Name Type Description
C number Circumference
Source:
Returns:
C⁄2π
Type
number
Example 
// returns 4
mathform.geometry.Circle.radiusFromCircumference(25.132741228718345);

# radiusFromDiameter(d) → {number}

Calculates radius of a circle from its diameter.
Parameters:
Name Type Description
d number Diameter
Source:
Returns:
d⁄2
Type
number
Example 
// returns 4
mathform.geometry.Circle.radiusFromDiameter(8);