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平行四邊形面積一
Author:
keihin
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
畫出對稱圖形
三位數除以一位數（二）
直角坐標平面上的旋轉變換
拼砌四邊形
Discover Resources
waaachen
Homework7
與三個半圓相切的圓不規則區域著色全
大園寶
垂心應用
Discover Topics
Tangent Function
Planes
Similar Triangles
Dilation
Exponential Functions