Geometry/Perimeter and Arclength
< Geometry
Perimeter of Circle edit
The circles perimeter can be calculated using the following formula
where the radius of the circle.
Perimeter of Polygons edit
The perimeter of a polygon with number of sides abbreviated can be calculated using the following formula
- .
Arclength of Circles edit
The arclength of a given circle with radius can be calculated using
where is the angle given in radians.
Arclength of Curves edit
If a curve in has the parametric form for , then the arclength can be calculated using the following fomula
Derivation of formula can be found using differential geometry on infinitely small triangles.