Polygon Angles

Exterior Angles of Regular Polygons


Interior Angles of Regular Polygons

Interior Angles of Irregular Polygons

The sum of the interior angles of an n-sided polygon is 180 × n - 360 degrees.

⏯ Regular Exterior ⏯ Regular Interior ⏯ Irregular Interior

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Area and Perimeter of a Parallelogram

Area and Perimeter of a Parallelogram

Many different ways to practise your skills finding the areas and perimeters of parallelograms. So far this activity has been accessed 19 times and 11 Transum Trophies have been awarded for completing it.

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