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Topics: Starter  Angles  Geometry  Number  Shape
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Can you find polygons with angles all prime numbers?
Can you find polygons with angles all triangular numbers?
Can you draw one of the polygons above such that the perimeter, measured in cm, is a square number?
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Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Here is the URL which will take them to a related student activity.
A spreadsheet may assist students investigating totals of square numbers.
The free software GeoGebra may assist students drawing the shapes.