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垂心(劉虹圻623)
Author:
呂麗珠
Topic:
Orthocenter
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
柱體建築師
【案例】2013年安徽高考15题
球體建築師
兩位數除以一位數（一）
Discover Resources
Congruent Triangles Demo
外面有圓
內外切圓性質
題3
七巧板
Discover Topics
Triangles
Continuity
Interest Calculation
Conic Sections
Quadrilaterals