Journal of Automated Reasoning

, Volume 45, Issue 3, pp 213–241 | Cite as

Visually Dynamic Presentation of Proofs in Plane Geometry

Part 1. Basic Features and the Manual Input Method
  • Zheng Ye
  • Shang-Ching Chou
  • Xiao-Shan Gao


With dynamic mediums such as computer displays, we propose a new kind of visually dynamic presentation of proofs in plane geometry. In a single diagram for the proof, when the proof text goes on step by step with mouse clicks, the related geometry elements in the diagram are added, animated, or deleted dynamically with various visually dynamic effects. It solves not only the problem of identifying geometry elements in the proof text with those in the diagram, but also makes the proof more vividly visualized and intuitive. Our ongoing developing system “Java Geometry Expert” (JGEX) uses two methods to create such visually dynamic presentations: the manual input method and the automatic method. In this first part of the series of our work, we propose the main features of our visually dynamic presentation of proofs and present the manual input method to create such presentations. The manual input method mainly uses mouse clicks to create the dynamic geometry diagram and the proof text.


Geometry theorem proving Visually dynamic presentation of proof Dynamic geometry Unordered geometry Gelernter Java Geometry Expert Morley’s theorem Feuerbach’s theorem Pythagorean theorem Pedal triangle 


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Copyright information

© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.College of Computer Science and TechnologyZhejiang UniversityHangzhouChina
  2. 2.Department of Computer ScienceWichita State UniversityWichitaUSA
  3. 3.KLMM, Institute of Systems ScienceThe Chinese Academy of SciencesBeijingChina

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