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勾股树
Author:
薛学忠
Topic:
Pythagoras or Pythagorean Theorem
GeoGebra
New Resources
第八周作业3
双心四边形
第八周作业2
异形操场
盈利與虧蝕
Discover Resources
BkD_act15_03c
畢氏定理證明（Ｉ）
day01_04
直角三角形斜邊上的高
長方體的體積
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Translation
Rhombus
Circumcircle or Circumscribed Circle
Dilation
Percentages