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Angle

 

Angle formula

θ=lar 
Symbol English Metric
θ = Angle deg rad
la = Arc Length in mm
r = Radius in mm

circle diameter 4An angle, abbreviated as A, θ or , is formed by two lines having a common point or vertex. 

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Angle formula

θ=2Aser2 
Symbol English Metric
θ = Angle deg rad
Ase = Sector Area in2 mm2
r = Radius in mm