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waaachen
Author:
陳兪宏
奕程老師的幾何問題
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Test
埕瑋_幾何證明_p16_實力演練4
no.1
illusiion 6 平行线错觉
埕瑋_幾何證明_p16_實力演練2
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方格紙上畫正方形1
sum of interior angle
盾牌(小動畫)
circle
方位(PO)
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Pyramid
Numbers
Straight Lines
Hyberbola
Addition
