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三角形的高與面積
Author:
+x sir
GeoGebra
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兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
柱體建築師
判斷球體
球體建築師
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gjh-e01-04 未知數角度的三角形
How to draw an ennegon with ruler and compasses?
ABC 3
線性代數
正三角形堆垛
Discover Topics
Fractal Geometry
Rational Numbers
Subtraction
Polygons
Rectangle