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保持比例
Author:
hjyanghj
Topic:
Geometry
GeoGebra
New Resources
拼砌四邊形
四邊形的特性
兩位數加法
第八周作业
兩位數除以一位數（二）
Discover Resources
n星角
優良作品3(祥恩)
perimeter
Pyramid (Angle between Plane HBC and HCD)
角度、弧度互換
Discover Topics
Root
Cone
Continuity
Geometric Transformations
Median Line