Circles

Here are all the circle valued functions:

• circle(A, B)
  Circle of diameter AB.
• circle(A, B, C)
  Circumcircle of triangle ABC.
• circle(A, x)
  Circle of center A and radius x.
• incircle(A, B, C)
• translation(c, u)
• reflection(c, l)
• rotation(c, A [, a])
  Rotation of center A and angle a (default: 180°).
• homothecy(c, A, x)
  Homothecy, i.e. expansion or dilation, of center A and ratio x.

There are also the two following multiple assignments:

• A B intersection(l, c)
• A B intersection(c, c')