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20 February, 09:56

What is the measure of an exterior angle of a regular quadrilateral

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  1. 20 February, 10:22
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    - - Any "regular" polygon has all sides equal AND all angles equal.

    - - The sum of the angles inside a 4-sided figure is 360°.

    - - So it it's a regular figure, then each angle is 360°/4 = 90°.

    - - The total angle around each vertex is 360°.

    If 90° of them are inside, then the exterior angle is the remaining 270°.
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