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梯形的高
Author:
鍾文欽
Topic:
Trapezoid
GeoGebra
New Resources
四邊形的特性
小数 的副本
算柱 (兩位數)
長方體平面投影 (Codex版)
拼砌四邊形
Discover Resources
擴分和約分
軌跡觀察---兩圓上線段中點
異分母分數加法
等腰三角形
七巧板（tangram）的副本
Discover Topics
Line Segment
Fractions
Congruence
Scalene Triangles
Linear Regression