An interactive geogebra applet that aids modeling calculating internal and external angles in polygons or the number of sides a regular polygon has from the internal/external angles. Please see the video for how the use the teaching aid. I have also included two differentiated worksheets. One for internal angles and one for external angles.
The geogebra applet is attached but if you don’t have it installed then the web link is also attached so you can use the applet in any web browser.
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£2.50