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Names of polygons
Drag the slider across to see the names of polygons with up to 13 sides.
See G4a – Properties of special triangles and quadrilaterals for more on particular types of triangles and quadrilaterals.
2D geometry – terms and notation
This lesson covers the following key words: edge, vertex, equal edges and angles, and parallel.
The definitions of acute, right, obtuse and reflex angles are covered in lesson G15a.
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What links the words vertigo and vertex? They both come from the Latin verb vertere meaning to turn.
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