Angle and Circle Characterizations of Tangential Quadrilaterals
نویسندگان
چکیده
We prove five necessary and sufficient conditions for a convex quadrilateral to have an incircle that concerns angles or circles.
منابع مشابه
On a Circle Containing the Incenters of Tangential Quadrilaterals
When we fix one side and draw different tangential quadrilaterals having the same side lengths but different angles we observe that their incenters lie on a circle. Based on a known formula expressing the incircle radius of a tangential quadrilateral by its tangent lengths, some older results will be presented in a new light and the equation of the before mentioned circle will appear. This circ...
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