Polygons

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9 Terms

1
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Polygon

A closed, flat figure made of straight sides that meet only at endpoints

2
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Convex Polygon

A polygon where all interior angles are less than 180°

3
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Concave Polygon

A polygon with at least one interior angle greater than 180°

4
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Regular Polygon

A polygon that is both equilateral (equal sides) and equiangular (equal angles)

5
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Interior Angle Sum of Polygon

The sum of interior angles of an n-sided polygon is (n − 2) × 180°

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Exterior Angle Sum of Polygon

The sum of exterior angles of any polygon is always 360°

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Number of Diagonals of Polygon

The number of diagonals is given by n(n − 3) ÷ 2

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One Interior Angle of Regular Polygon

Calculated by [(n − 2) × 180°] ÷ n

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One Exterior Angle of Regular Polygon

Calculated by 360° ÷ n