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anlge at centre twice angle at circumference
Author:
lamyc
GeoGebra
New Resources
龙形曲线-分形龙
直線的斜率：水平變化 & 鉛垂變化
第八周作业3
多邊形的面積
讀磅
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賴桑_等差數列與級數_兩數列之比例
垂直線的斜率關係
內心
S5 Permutation and Combination
序列（圆内弦）
Discover Topics
Constructions
Curve Sketching
Perimeter
Vectors 2D (Two-Dimensional)
Frequency Distribution