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三角形面積公式 1/2 bc sinA
Author:
羅驥韡 (Pegasus Roe)
Topic:
Area
GeoGebra
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三半圓間的相切圓(Codex╱2026.10.07)
sanjiaohanshu
Fibonacci Clock
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Geogebrafinal Mak Tik Hong 11043289
Text in Spreedsheet
正八角錐(旋轉，實體、透視)
高中多項式
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