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Online Geometry: Cyclic Quadrilateral Theorems
and Problems- Table of Content 3
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![Triangle, Four circumcircles](../problem/p547_triangle_circumcircles.jpg) |
Problem
547.
Triangle, Transversal, Four Circumcircles, Concurrency. |
![Cyclic quadrilateral, Diagonal, Diameter](../problem/p530_cyclic_quadrilateral_1.jpg) |
Problem 530.
Cyclic Quadrilateral, Diagonal, Diameter, Perpendicular, Congruence. |
![Elearn 492: Quadrilateral, CIrcle, Perpendicular, Parallel](../problem/p492_quadrilateral_circle_1.jpg) |
Problem 492.
Cyclic Quadrilateral, Circle, Perpendicular, Side, Diagonal, Parallel. |
![Circle, Angle, Incenter, Isosceles triangle, Cyclic quadrilateral](../problem/p439_circle_angle_1.jpg) |
Proposed Problem 439.
Isosceles triangle, Cevian, Incenter, Angles, Circle, Cyclic
quadrilateral. |
![Square, 45 degrees](../problem/p367_square_45_17.jpg) |
Proposed Problem 367.
Square, Angle, 45 degrees, Pythagoras, Congruence, Similarity. |
![Cyclic quadrilateral, Rhombus](../problem/p359_cyclic_quadrilateral_1.jpg) |
Proposed Problem 359.
Cyclic quadrilateral, Angle bisector, Rhombus. |
![Circles, Tangent, Concyclic points](../problem/p355_circle_concyclic_17.jpg) |
Proposed Problem 355.
Circles, Common external tangent, Concyclic points, Cyclic
quadrilateral. |
![Triangle, Altitude, Circle, Concyclic points](../problem/p347_triangle_circle_17.jpg) |
Proposed Problem 347.
Triangle, Altitude, Perpendicular, Circle, Concyclic points.
Cyclic quadrilateral. |
![Problem 338 concyclic points](../problem/p338_triangle_concyclic_17.jpg) |
Proposed Problem 338.
Triangle, Circumcircle, Inscribed Circle, Exterior angle bisector,
Concyclic points.
Cyclic quadrilateral. |
![Isosceles Trapezoid, Concyclic Points](../problem/p337_concyclic_trapezoid_17.jpg) |
Proposed Problem 337.
Isosceles Trapezoid, Angle bisector, Parallel, Concyclic points.
Cyclic quadrilateral. |
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