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圆锥侧面的展开
Author:
肖建伟
GeoGebra
New Resources
畫出對稱圖形
兩位數除以一位數（二）
三位數除以一位數（二）
算柱 (兩位數)
異分母分數減法
Discover Resources
例題11
Introduction to Rectangular Coordinates 直角坐標簡介
半圓柱
光的折射（光线自右下向左上）
PA + PB
Discover Topics
Centroid or Barycenter
Fractal Geometry
Straight Lines
Symmetry
Unit Circle
