Basic: add some lemmas
CirclePower: fill sorrys
IncribedAngle: fill sorrys
LCPosition: fix up, and finish the uniqueness of inx pts
CCPosition: fix up
Perpendicular_trash: add theorems to say the perp_foot is unique
Ray_trash: add two lemmas which are used in Angle_trash
Angle_trash: add two theorems to describe special AngValue
Basic: add some lemmas CirclePower: fill sorrys IncribedAngle: fill sorrys LCPosition: fix up, and finish the uniqueness of inx pts CCPosition: fix up
Perpendicular_trash: add theorems to say the perp_foot is unique Ray_trash: add two lemmas which are used in Angle_trash Angle_trash: add two theorems to describe special AngValue
Index: add a file path