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包絡線：橢圓
Author:
羅驥韡 (Pegasus Roe)
Topic:
Ellipse
GeoGebra
New Resources
圓的切線方程
空间中两直线的位置关系
常见四边形是否是双心四边形
百分數及其應用
祖冲之的期望：内棋与外棋
Discover Resources
複數等比級數
掃描不等式 (講義版)
star
旋轉長方形
中国纸质灯笼
Discover Topics
Pie Chart or Circle Chart
Cosine
Distributions
Perimeter
Tangent Line or Tangent