< PREVIOUS PROBLEM |
NEXT PROBLEM >
In a bicentric quadrilateral ABCD, AB,
BC, CD, and AD are tangent to the incircle at E,
F, G, and H. Prove that EG
and FH are perpendicular.
A bicentric quadrilateral ABCD is a convex quadrilateral that has both an incircle
I and a circumcircle O.
Search | Geometry
All Problems |
Problems Art Gallery
Cyclic Quadrilateral |
Tangential or circumscribed quadrilateral
| Solution / comment | by Antonio Gutierrez