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3-6-05
Author:
Tzuen Hsu
GeoGebra
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四邉形 (四年級) 教師版
異分母分數減法
三位數除以一位數（一）
算柱 (兩位數)
四邊形的特性
Discover Resources
方格紙上畫正方形3
Percentage（百分法）
∠APB ≥ 30°
Angle in alt.segment
cos(π/n)cos(2π/n)cos(3π/n) ... cos(nπ/n) = ?
Discover Topics
Right Triangles
Intersection
Parabola
Quadrilaterals
Means