plangeo3: STS Unavailable

plangeo3 defines the following Names, but STS signatures are not currently available.

• distance
• perpendicular
• parallel
• circle
• radius
• radius_of
• center
• center_of
• are_on_circle
• angle
• midpoint
• is_midpoint
• center_of_gravity
• perpbisector
• altitude
• perpline
• polarline
• tangent
• arc