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月绕地轨道
Author:
acchu
GeoGebra
New Resources
兩位數除以一位數（一）
四邊形的特性
畫出對稱圖形
兩組對邊相等和有直角的四邊形
【案例】2018年全国1卷理科12题
Discover Resources
斯坦納-雷米歐司(Steiner-Lehmus)定理證明二
圓心角
畢氏定理
三角形n邊形外角和
dingding_test
Discover Topics
Line Segment
Polygons
Optimization Problems
Geometric Distribution
Fractions