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畫三角形 題1a 的複本
Author:
sfcs_maths_p3
,
GeoGebra Institute of Hong Kong
GeoGebra
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異分母分數減法
兩位數除以一位數（一）
判斷球體
兩組對邊相等的四邊形
找出對稱軸
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過圓內一點最短弦
test file
angles sum on a striaght line
一元二次不等式(圖解法)
我的第一个绘本
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Linear Programming or Linear Optimization
Cube
Reflection
Tangent Function
Equilateral Triangles