Polygon Angles

Exterior Angles of Regular Polygons

insect

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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Xmas Light Sum

Xmas Light Sum

Arrange the coloured lights to create a balanced pattern where the total of each colour matches the target numbers. So far this activity has been accessed 3211 times and 161 Transum Trophies have been awarded for completing it.

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