Four incenter lie on a circle

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Let ABCD be a tangential qadrilateral, J is intersection of two perpendicular of AC,BD. Then four incenter of four triangles AJB,BJC,CJD,DJA lie on a circle

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Đào Thanh Oai — January 18, 2014 - 4:14 AM

Resource Type: Activity
Tags: concyclich cyclic four incenter intersection pependicular quadrilateral
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Target Group (Age): 19+
Language: English (United Kingdom)

GeoGebra version: 4.4
Views: 925

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Four incenter lie on a circle

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