Go Geometry Problems

Dynamic Geometry Problem 892: Triangle, Angle, 60 degrees, Orthocenter, Circumcenter. GeoGebra, HTML5 Animation for Tablets (iPad, Nexus). Levels: School,  College, Mathematics Education

The dynamic figure below shows a triangle ABC with angle B = 60 degrees and AB > BC. If H is the orthocenter and O is the circumcenter, prove that angle AHO = 30 degrees.


Dynamic Geometry of Problem 892
The interactive demonstration above was created with GeoGebra.

To stop/play the animation: tap the icon in the lower left corner.
To reset the interactive figure to its initial state: tap the icon in the upper right corner.
To manipulate the interactive figure: tap and drag points or lines.

GeoGebra is free and multi-platform dynamic mathematics software for all levels of education that joins geometry, algebra, tables, graphing, statistics and calculus application, intended for teachers and students. Many parts of GeoGebra have been ported to HTML5. It has received several educational software awards in Europe and the USA.

Dynamic Geometry Problem 892: Triangle, 60 degrees, Orthocenter, Circumcenter. HTML5 Animation for Tablets


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