Exterior Angles Flashcards

GCSE Mathematics (Edexcel) 1MA1

Exterior angle of a polygon

The angle formed between one side of a polygon and the extension of an adjacent side.

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Terms in this set (10)

1

Exterior angle of a polygon

The angle formed between one side of a polygon and the extension of an adjacent side.

2

Sum of exterior angles of any polygon

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

3

Exterior angle of a regular polygon

The exterior angle of a regular polygon is calculated as 360° divided by the number of sides.

4

Relationship between interior and exterior angles

Interior angle + Exterior angle = 180° (on a straight line).

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Exterior angle of a triangle

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

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Exterior angle formula for regular polygons

Exterior angle = 360° ÷ n, where n is the number of sides.

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Exterior angle of a square

The exterior angle of a square is 90° (360° ÷ 4).

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Exterior angle of a hexagon

The exterior angle of a regular hexagon is 60° (360° ÷ 6).

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Exterior angle of an octagon

The exterior angle of a regular octagon is 45° (360° ÷ 8).

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Using exterior angles to find the number of sides

Number of sides = 360° ÷ Exterior angle (for regular polygons).

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