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九上1-2平行四邊形證明題0929
Author:
Lin Ching Chieh
GeoGebra
New Resources
平行線的判定
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
撒针估算面积实验
中华人民共和国国旗
Discover Resources
代數運算：外心座標
湯圓rice ball
Features from Vertex form
連鎖法則 (Chain Rule)
拋物線與圓的最短距離
Discover Topics
Mathematics
Complex Numbers
Sequences and Series
Orthocenter
Parabola