Dynamic Geometry Problem 894: Triangle, Angle, 60 degrees, Incenter, Midpoint, Parallel Lines. GeoGebra, Step-by-step Illustration

The dynamic figure blow shows a scalene triangle ABC, where angle B = 60 degrees. I is the incenter, D is the midpoint of BC, and E is the midpoint of AB. The extension of DI intersects BA at point M, and the extension of EI intersects BC at point N. Prove that AN is parallel to MC.

Problem 894
Triangle's power,
Angle be sixty degrees,
Incenter's presence.
Midpoint's harmony revealed,
Parallel lines, truth unveiled.


Static Diagram of Problem 894

Dynamic Geometry Problem 894: Triangle, Angle, 60 degrees, Incenter, Midpoint, Parallel Lines. GeoGebra, HTML5 Animation, Step-by-step Illustration, iPad Apps


Poster of Problem 894 using iPad Apps

Static Geometry Problem 894: Triangle, Angle, 60 degrees, Incenter, Midpoint, Parallel Lines. HTML5 Animation, Using GeoGebra, iPad Apps

Classroom Resource:
Interactive step-by-step animation using GeoGebra

This step-by-step interactive illustration was created with GeoGebra.

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