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三角形三线合一
Author:
夜雨嘀嗒
GeoGebra
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活动三:应用性质
常见四边形是否是双心四边形
比較五件物件的重量
撒针估算面积实验
第八周作业1
Discover Resources
拼貼3
梯形面積 Area of Trapezium
霓虹燈
中央極限定理的副本
里约奥运火炬花环模型
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Planes
Linear Programming or Linear Optimization
Cube
Parallelogram
Division