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8.3 基本几何体（正三棱椎与外接球）
Author:
张中强
正三棱锥与外接球
GeoGebra
New Resources
三位數除以一位數（二）
球体的体积推导
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
三位數除以一位數（一）
Discover Resources
內心
Fraction to Decimal
時鐘
三角排列
Hamid Naderi Yeganeh segment5
Discover Topics
Vectors 3D (Three-Dimensional)
Frequency Distribution
Rhombus
Translation
Quadratic Equations