Cyclic Quadrilaterals
Given two triangles ACE, BDF
intersecting at 6 points: G,H,I,J,K,L
as shown in the figure. It is given that in each of the quadrilaterals
EFGI, DELH, CDKG, BCJL, ABIK a circle can be inscribed.
Is it possible that a circle can also be inscribed in quadrilateral FAHJ?

Difficulty level (1 very easy - 10 very hard): 3
Topics:
Geometry
->
Solid Geometry / Geometry in Space
Geometry
->
Plane Geometry
->
Circles
Algebra
->
Equations
Algebra
->
Inequalities
Proof and Example
->
Proof by Contradiction
Geometry
->
Plane Geometry
->
Angle Calculation
- Gillis Mathematical Olympiad, 2019-2020 Question 5
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