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圓周角觀察操作
Author:
陳隆期
GeoGebra
New Resources
兩組對邊相等的四邊形
球體建築師
四邊形的特性
三位數除以一位數（二）
柱體建築師
Discover Resources
「相似三角形」任务1
尺規作圖髒髒版
Drawing quadrilaterals on the grid or the pinboard
Homework7
兩圓內外公切線
Discover Topics
Tangent Function
Hypothesis Testing
Secant Line or Secant
Optimization Problems
Trigonometric Functions