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數學傳播39卷4期, 平面幾何公式思考
Author:
Yu-Tuan Lin
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兩位數除以一位數（二）
判斷球體
算柱 (兩位數)
四邊形的特性
球體建築師
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垂心即內心
Projection
P3 平行與垂直
taeyeon
Opp angles cyclic quad
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Pythagoras or Pythagorean Theorem
Fractal Geometry
Sequences and Series
Cube
Probability