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任务7：内外弦图
Author:
陈丽婷
GeoGebra
New Resources
中华人民共和国国旗
双心四边形
正方形雪花图案
百分數及其應用
异形操场
Discover Resources
橢圓軌跡加滑桿
Scheimpflug image
圓餅圖
軌跡練習1
yuanmianjituidao
Discover Topics
Subtraction
Upper and Lower Sum or Riemann Sum
Coordinates
Quadratic Functions
Ellipse