Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Lesson
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

Animation 185

Author:Tim Brzezinski
Topic:Angles, Parallelogram, Quadrilaterals

What geometry theorem is dynamically being illustrated in the applet below? (Feel free to move the 3 larger white points anywhere you'd like.)

Check my answer

New Resources

  • Function art 3D - waiting shed (v2)
  • Compound Inequality Illustrator: Conjunctions and Disjunctions
  • Congruent Sides & Angles in △s: Exploration
  • Midpoint Theorem (V2): Integer Solutions
  • Right Triangle Inscribed in a Semicircle

Discover Resources

  • Coordinate Plane
  • shadows1
  • Concavelens1
  • Angle Sum Property of Quadrilateral - 2
  • Vector-Valued Functions in Space

Discover Topics

  • Vectors 2D (Two-Dimensional)
  • Hyperbola
  • Cylinder
  • Arithmetic Mean
  • Sequences and Series
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2026 GeoGebra®