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一线三等角
Author:
艳er
GeoGebra
New Resources
百分數及其應用
第八周作业2
撒针估算面积实验
正方形雪花图案
直線的斜率：水平變化 & 鉛垂變化
Discover Resources
Angle Sum in a Triangle
Incentre
向量線性組合的範圍
平行四邊形面積
Copy of 畢氏樹
Discover Topics
Area
Polygons
Trigonometric Functions
Line Segment
Arithmetic Operations