
Position along the arc
Equation 
Since the perimeter of a circle is 2\pi r, half Sum (1) (a) along the circle will correspond to the arc spanned by opposite Leg (\theta), so:
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s
Half Sum (1)
m
6294
\theta
Opposite Leg
rad
5059
r
Radius
m
9894
ID:(3324, 0)

Relation of similarity of Triangles
Equation 
\displaystyle\frac{\bar{AB}}{\bar{A'B'}}=\displaystyle\frac{\bar{AC}}{\bar{A'C'}}=\displaystyle\frac{\bar{BC}}{\bar{B'C'}}
ID:(3263, 0)