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Angle

 

Angle formula

\( \theta \;=\;  \dfrac{ l_a }{ r }\) 
Symbol English Metric
\( \theta \) = Angle \(deg\) \(rad\)
\( l_a \) = Arc Length \( in\) \( mm \)
\( r \) = Radius \(in\) \(mm\)

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

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Angle formula

\( \theta \;=\;  \dfrac{ 2 \cdot A_{se} }{ r^2 }\) 
Symbol English Metric
\( \theta \) = Angle \(deg\) \(rad\)
\( A_{se} \) = Sector Area \(in^2\) \(mm^2\)
\( r \) = Radius \(in\) \(mm\)