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GeoGebra
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exterior angle of triangle demo
Author:
Ngan Hok Hei
through dragging the point, students should be able to see something being conserved.
GeoGebra
New Resources
Play C3 E3 G3 C4_C4
van Aubel's Theorem
A retro cityscape with mathematics
Supplementary Angles
Angles and Intersecting Lines: Quick Investigation
Discover Resources
tangentes_ellipse
AS1S2 Exploration
Tilted Moon Orbit
Attempt 1 Picture
Mystery Tab 2
Discover Topics
Rational Numbers
Geometric Distribution
Upper and Lower Sum or Riemann Sum
Polygons
Rhombus