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抛物线第一定义
Author:
wangyiyao
Topic:
Conic Sections
,
Parabola
GeoGebra
New Resources
球体的体积推导（优化版）
算柱 (兩位數)
判斷球體
球體建築師
兩組對邊相等和有直角的四邊形
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點到直線距離-3 最短發生在垂直時
半圓柱(可改底面圓半徑、柱高)
謝爾賓斯基三角形
直线与圆的位置关系
正N边形点列
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Symmetry
Addition
Area
Kite
Right Triangles