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Cyclic Quadrilaterals and Concyclic Points 圓內接四邊形與共圓點
Author:
Alex CHIK
Topic:
Quadrilaterals
GeoGebra
gMath 互動數學教室
http://www.geogebra.hk
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Hoback 6: Regular Hexagon
pg303 #19
non rectangular p-gram by both prs opp sides congruent
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