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Polygon Worksheets
Polygon worksheets contain identifying polygons based on sides, basic polygon activities and charts, area and perimeter of polygon, identifing interior and exterior angles and more.

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Identifying Polygons
Polygon or not a Polygon
Write polygon or not a polygon. Each worksheet contains 12 problems.
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Regular or Irregular Polygon
Check whether the given polygon is regular or irregular.
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Concave or Convex Polygon
Every interior angle in a convex polygon is less than 180^{o}. Based on this property, classify the polygon as concave or convex.
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Naming Polygon
Write the name by counting number of sides in each polygon.
Regular:
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Irregular (convex):
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Irregular (concave):
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Mixed:
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Area and Perimeter of Polygon
Perimeter of Regular Polygon
To find the perimeter of regular polygons, multiply the length of the side with number of sides.
Easy:
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Moderate:
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Difficult:
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Finding Side Length from Perimeter
If the perimeter of a regular polygon is known, then the side length would be calculated by dividing perimeter with number of sides.
Easy:
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Moderate:
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Difficult:
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Finding Unknown Sides: Algebra
Perimeter of each polygon is given. Side lengths were given in algebraic expression. Find the value of x and calculate the length of unknown sides.
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Area and Perimeter
Area = 1/2 * Apothem * Perimeter
After finding perimeter, use the above formula to find the area of each regular polygon.
Easy:
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Moderate:
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Finding Apothem
Each worksheet has 9 practice problems finding length of apothem. To find apothem, divide the area by perimeter and double the quotient.
Basic Polygons
Types of Polygon: Chart
Cute charts that describe types of polygons. Available in both color and blackwhite.
Color the Polygons
Basic worksheet to practice polygons. Suitable for K3 children.
For more basic worksheets, please refer shapes worksheets.
Angles in a Polygon
Sum of Interior Angles
Sum of the interior angles = (number of sides  2) * 180^{o}
If the polygon has 5 sides, then the sum of the interior angles would be 3 * 180 = 540^{o}
Easy:
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Moderate:
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Interior Angle: Regular Polygon
For regular polygon, each interior angle can be measured by dividing the sum of interior angles with number of sides of a polygon.
Easy:
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Moderate:
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Interior Angle: Irregular Polygon
To find the missing angle, sum up the given angles and subtract it from the sum of interior angles.
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Exterior Angle: Regular Polygon
Each polygon worksheet has 12 problems finding exterior angle of regular polygon. To find exterior angle, divide 360^{o} by number of sides of a polygon.
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Unknown Angles: Algebra
Calculate the sum of interior angles; find the value of x to find the value of missing angles.