Duncan's Geogebra

D Whittaker, Jun 9, 2017


  • 1. Exterior Angles of Polygons
  • 2. Investigate the sum of interior angles in polygons
  • 3. Angles of Polygons Discovery
  • 4. Graph the Line
  • 5. Converting Time
  • 6. Rotational Symmetry
  • 7. Adding Fractions with Diagrams
  • 8. Frequency Polygons, Cumulative Frequency and Box Plots (2.02a)
  • 9. Improper Fractions and Mixed Numbers
  • 10. Pavés et volumes
  • 11. Copy of Množenje razlomaka / Multiplying fractions
  • 12. Dividing a Whole Number by a Fraction
  • 13. Regular polygon

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Exterior Angles of Polygons

[b]Click the "▶" button. Observe the angles turned by the car at the corners.[br]Drag the green points. Check the "Show Measurement" box to see the measurements of the angles.[br][/b]中文版：[url=https://ggbm.at/551]https://ggbm.at/551[/url]
[b]1. What is a + b + c + d + e, the total angles turned by the car?[br]2. a, b, c, d, e are called the exterior angles of the convex pentagon.[br]　　In general, what is the sum of all exterior angles of a convex polygon?[br]3. How would you modify the result if the pentagon is NOT convex?[br][/b][br]Anthony Or. GeoGebra Institute of Hong Kong.
– Anthony OR 柯志明

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