Sum of Interior Angles of a Polygon

Συγγραφέας:現代中學數學 Modern Secondary Mathematics

Investigate the sum of interior angles of a polygon by observing the number of triangles the polygon can be divided into. (for use with P.4.10 and P.4.11 of Book 1B)

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Proving Triangles Similar: Multistep Transformations
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Arc Length & Sector Area
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