Angle

on . Posted in Geometry

circle diameter 4An angle, abbreviated as \(\:A\:\), \(\:\theta\:\) or \(\:\angle\:\), is formed by two lines having a common point or vertex.

 

Angle formulas

\( \theta =  l_a \;/\; r\) 

\( \theta = 2 \; A_{se} \;/\; r^2 \) 

Symbol English Metric
\( \theta \) = angle \(deg\) \(rad\)
\( l_a \) = arc length \( in\) \( mm \)
\( r \) = radius \(in\) \(mm\)
\( A_{se} \) = sector area \(in^2\) \(mm^2\)

 

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Tags: Plane Geometry Solid Geometry