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平行四邊形
Author:
Ching-Hui Chou
Topic:
Parallelogram
GeoGebra
New Resources
直角坐標平面上的旋轉變換
三位數除以一位數（一）
算柱 (兩位數)
拼砌四邊形
四邉形 (四年級) 教師版
Discover Resources
直線與曲線
空間中正立方體
Apollonius Problem 5 CPP Inversion
角平分線性質
congruent (SSS) 2
Discover Topics
Area
Ratios
Bar Chart or Bar Graph
Standard Deviation
Difference and Slope