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cherry910502
GeoGebra
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四邉形 (四年級) 教師版
畫出對稱圖形
兩組對邊相等和有直角的四邊形
兩位數加法
三位數除以一位數（二）
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利用对称求线段和最值（移动端）
Similar triangles inscribed iteration400
圓柱體斜切塊體積
廣義三角：sin, cos
兩條直線垂直應用
Discover Topics
Bar Chart or Bar Graph
Pie Chart or Circle Chart
Linear Programming or Linear Optimization
Orthocenter
LCM and GCD