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半圓內切球內切圓
Author:
YS Chen
GeoGebra
New Resources
兩位數加法
三位數除以一位數（一）
兩位數除以一位數（二）
四邊形的特性
判斷球體
Discover Resources
Prism and Cylinder 1
角度比較
三角形的三角和及外心、內心圓
分割平行四邊形長方形
切割正八面體
Discover Topics
LCM and GCD
Straight Lines
Scalene Triangles
Limits
Rectangle