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Penrose 三角形
Author:
yiyi
GeoGebra
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折扣
第八周作业
正方形雪花图案
龙形曲线-分形龙2
第八周作业1
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梯形面積---麥田圈
gjh-e01-04 未知數角度的三角形
Copy of gjc091b18 圓的割線
Copy of 圓周公式應用題1
複數平面-Apple Logo
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Triangles
Pyramid
Sequences and Series
Calculus
Cube