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The sides and angles are all different, so it is an irregular decagon. Zach asks what a regular decagon would look like, and Ada explains that in a regular polygon, all the sides are the same ...
Learn more about how angles in an 𝒏-sided polygon add to 180° × (𝒏 – 2) with this BBC Bitesize Maths article. For students between the ages of 11 and 14.
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