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橢圓規Ellipsograph of Parallelogram
Author:
宋政蒲
Topic:
Constructions
,
Ellipse
,
Parallelogram
現實工程上仍不易做到的橢圓畫法
GeoGebra
New Resources
四邊形的特性
算柱 (兩位數)
Nested spiral octagon
國旗 (Claude 版)
伊朗國旗 (Codex╱2026.10.07)
Discover Resources
兩針夾角
角的大小比較
聖者即正義
國旗腳踏車
Illusion-外凸的正方形
Discover Topics
Prism
Algebra
Upper and Lower Sum or Riemann Sum
Pythagoras or Pythagorean Theorem
Inequalities