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Identify Regular Polygons Worksheets

Name regular polygons with five through twelve sides using clear, rotated diagrams and a separate answer key.

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Name each regular polygon. Count each side once, working around the figure.

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Count every side once

Begin at one vertex, count around the boundary, and stop when you return to the start. An eleven-sided polygon is an undecagon, also called a hendecagon.

Learning objective

What this activity builds

Count sides and name regular polygons from pentagons through dodecagons.

Worked example

A regular polygon has eleven sides. What is its name?

Undecagon (also called a hendecagon).

The polygon name depends on its number of sides; rotating the diagram does not change its name.

Teaching notes

Make the practice count

  • Start at one vertex and work around the outline.
  • A regular polygon has equal sides and equal interior angles.
  • Changing the orientation does not change the shape.

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Twelve rotated, unlabeled diagrams balance the polygon types you select. Choose one type for focused repetition or several for mixed practice.

Worksheet settings

Polygon types
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Math SheetNameScoreTeacherDateIdentify Regular PolygonsName each regular polygon. Count its equal sides and vertices carefully.1. Name this regular polygon.Type:2. Name this regular polygon.Type:3. Name this regular polygon.Type:4. Name this regular polygon.Type:5. Name this regular polygon.Type:6. Name this regular polygon.Type:7. Name this regular polygon.Type:8. Name this regular polygon.Type:9. Name this regular polygon.Type:10. Name this regular polygon.Type:11. Name this regular polygon.Type:12. Name this regular polygon.Type:Regular polygons have equal side lengths and equal interior angles.math-sheet.comPage 1 of 1

A useful next step

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First page preview: Regular Polygon Angles Worksheets

Geometry

Regular Polygon Angles Worksheets

Find one interior angle, one exterior angle and the interior-angle sum for regular polygons with five through twelve sides.

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