Sides and vertices of 2D shapes

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Learn it Polygons are named by their number of sides: triangle 3, quadrilateral 4, pentagon 5, hexagon 6, heptagon 7, octagon 8. Each has the same number of vertices (corners).

Example: How many sides and vertices does a pentagon have?

"Penta" means 5.
A pentagon has 5 sides and 5 vertices.

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