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梯形
Author:
Yip Chi Wai
Topic:
Trapezoid
GeoGebra
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四邊形的特性
錐體建築師
球體建築師
兩位數加法
GeoGebra笔记功能体验课件
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龍騰4_1-1課進9
周子翔 畢氏定理--2
ptccs2new4
重难题组周练（1）——二次函数
六个常见超越函数图像
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Ratios
Square
Matrices
Unit Circle
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