WOLFRAM|DEMONSTRATIONS PROJECT

Segment Theorem

​
segment angle
π
3
segment base
AB
BA
vertex angle
π
4
Drag the point of tangency of the red line
AB
anywhere on the black circle. The points
A
and
B
are on the other two lines tangent to this circle. The light red segment with chord
AB
has a fixed central angle. The segment's red circle is always tangent to each of the two light blue circles.