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Equiangular Puzzle 2
作者:
Jennifer Silverman
Problem from Brilliant by Áron Bán-Szabó,
https://brilliant.org/weekly-problems/2017-07-03/intermediate/
GeoGebra
新资源
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繪畫垂直線
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Rovnoběžnost rovin
发现资源
삼각함수 그래프
Something
Angles and measures (triangles)
Perpendicular Lines
quadratic inequalities Q5
发现主题
二维向量
函数
垂心
极值问题
统计特征