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拿破崙三角形
Author:
羅驥韡 (Pegasus Roe)
說明影片：
http://youtu.be/q9nxM2MYOVE
GeoGebra
New Resources
Nested spiral octagon
美國國旗 (Claude 版)
兩組對邊相等和有直角的四邊形
長方體平面投影 (Codex版)
算柱 (兩位數)
Discover Resources
垂足三角形
repetitive square
circuit
circle
翰林數學_2下_CH4-2_平行四邊形性質
Discover Topics
Arithmetic Mean
Volume
Similarity Transformation or Similarity
Probability
Cube