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H-Obtuse angle July12019a
作者：
MathCenter
GeoGebra
最新資源
Locus Related to Descartes' Folium
Reflection across a line
Circle Passing Through 3 Points
רישום חופשי
Reflection Across 2 Parallel Lines
探索資源
foncflech
intersecting chord theorem
Daisy
Slope Investigation - Find e
conic verticle
Angle Measures in Polygons
探索主題
三角函數
黎曼和（Riemann Sum）
正切線或正切
三角形
乘法