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在三角形兩個邊各取一點使得三線段等長(BK=KL=CL)
Author:
黃國斌
請按 play 鍵
GeoGebra
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Nested spiral octagon
兩組對邊相等和有直角的四邊形
Fibonacci Clock
拼砌四邊形
找出對稱軸
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