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定长线段在相交直线上滑动
Author:
冯伟冀
GeoGebra
New Resources
百分數及其應用
三角函数 的副本
常见四边形是否是双心四边形
直線的斜率：水平變化 & 鉛垂變化
第八周作业
Discover Resources
五上_分數乘法(教師版)
優良作品3
學習單：三角形外切圓作法
rotational symmetry_1
圓內一點
Discover Topics
Piecewise Functions
Numbers
Curve Sketching
Vectors 2D (Two-Dimensional)
Trigonometric Functions