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  • Triangles: Points of Concurrency
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Triangles: Points of Concurrency

Author:
Maria Green, Tim Brzezinski
Topic:
Triangles
Circumcenter, Orthocenter, Centroid, Incenter, Perpendicular Bisectors, Altitudes, Medians, Angle Bisectors, Euler Line, 9-Point Circle
Triangles: Points of Concurrency

Table of Contents

  • Prerequisites

    • Triangle Altitude Illustrator and Definition Writing Prompt
    • Perpendicular Bisector Definition
    • Perpendicular Bisector Definition
    • Angle Bisector Definition (I)
    • Triangle Median Illustrator & Definition Writing Prompt
  • Dynamic Illustrations (no words or data)!

    • Circumcenter & Circumcircle Action!
    • Incenter & Incircle Action!
    • Medians and Centroid Dance
    • Medians & Equal Areas!
    • 9-Point Circle Action (Part 1)
    • 9-Point Circle Action (Part 2)
    • 9-Point Circle Action (Part 3A)
    • 9-Point Circle Action (Part 3B)
    • 9-Point Circle Action (Part 4)
    • Vivani Action!
    • Napoleon Motion!
    • GoGeometry Action 17!
  • Applets with Numerical Data

    • Orthocenter (& Questions)
    • Circumcenter (& Questions)
    • Medians Centroid Theorem (Proof without Words)
    • Incenter Exploration (B)
    • 9-Point Circle (Informal Investigation)
    • Triangle Medians: Quick Investigation
Next
Triangle Altitude Illustrator and Definition Writing Prompt

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