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初中八年级奥数：面积与面积法
Author:
王俊辉
拖动A、B、C、D，改变四边形形状
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
畫出對稱圖形
兩組對邊相等的四邊形
画直线等分三角形的面积
判斷球體
Discover Resources
判斷三角形
相似形_Tasks_Collection
B4 4-1 平行線性質延伸 等積變換
Percentage(百分法)
平面鏡多次成像_for_mobile
Discover Topics
Standard Deviation
Binomial Distribution
Calculus
Arithmetic
Linear Equations