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Heron formula
Author:
ralphchen
GeoGebra
New Resources
平行線的判定
百分數及其應用
科赫雪花
双心四边形
第八周作业1
Discover Resources
三角形3,4,5
蛇形排数
test
雙曲線
用極座標做時鐘的副本
Discover Topics
Pyramid
Quadratic Functions
Conic Sections
Arithmetic Operations
Special Points