# Circle Segment Equations Formulas Calculator

Math Geometry

Solving for arc length.
Equation is valid only when segment height is less than circle radius.

Inputs:
central angle (θ)
circle radius (r)
unitless
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Conversions:
central angle (θ)
= 0
= 0
radian
circle radius (r)
= 0
= 0

Solution:
arc length (s)
= NOT CALCULATED

Change Equation
Select to solve for a different unknown
Circle
 diameter radius
 circumference radius
 circumference diameter
 circumference area
 area radius
 area diameter
 area circumference radius

Segment of a Circle
 chord length circle radius circle center to chord midpoint distance
 segment area circle radius
 central angle arc length circle radius
 segment height circle radius circle center to chord midpoint distance

Sector of a Circle
 sector area circle radius central angle

Arc of a Circle
 arc length circle radius central angle

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