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梯形
Author:
Chan Ting Hin
Topic:
Trapezium
GeoGebra
New Resources
美國國旗 (Codex 版)
畫出對稱圖形
四邊形的特性
小数 的副本
找出對稱軸
Discover Resources
電子幾何條（2014）
hihi
How to reconstruct a quadrilateral farm to a triangular one with the same area?
堆垛系列
angle between 2 planes 02
Discover Topics
Unit Circle
Conic Sections
Geometric Transformations
Distributions
Rational Numbers