Exterior Angle of a Cyclic Quadrilateral (DSE Circle-ACT05A)
2017-03-20 02:36
This GeoGebra applet demonstrates the exterior angle theorem for a cyclic quadrilateral. By constructing circles, points, segments, rays, and angles, it visually illustrates that an exterior angle equals its opposite interior angle. The dynamic model includes multiple angle variables and is ideal for teaching circle geometry properties in secondary mathematics, helping students understand the rela
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