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An Equilateral Result
Author:
John Golden
Via The Futility Closet: a sweet observation about a point on the circumcircle of an equilateral triangle.
http://www.futilitycloset.com/2015/03/14/a-tidy-theorem/
More GeoGebra at
bit.ly/mh-ggb
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Parallel Lines and Angle Measures (2)
Open Middle: Pythagorean Theorem (1)
Open Middle: Pythagorean Theorem (2)
Parallel Lines and Angle Measures (1)
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이등변삼각형의 꼭지각의 이등분선은 밑변을 수직 이등분한다.(The bisector of the apex angle of the isosceles triangle divides the base vertically.)
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