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施爾瓦茲三角形 (三角形內接最短周長三角形)
Author:
学用数学
GeoGebra
New Resources
球體建築師
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
算柱 (兩位數)
找出對稱軸
Discover Resources
Summary
複合圖形(八)
PMC 2016-17
湯圓rice ball
Question 1
Discover Topics
Correlation
Cuboid
Prism
Set Theory
Pythagoras or Pythagorean Theorem