18-06-2020
Mathematics

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Work out the size of an exterior and an interior angle of a regular 12-sided polygon. Interior = Exterior =

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18-06-2020

[tex](n-2) \times 180[/tex]

[tex](12-2)\times 180[/tex]

[tex]10 \times 180[/tex]

[tex]1800[/tex]

[tex]1800\div 12[/tex]

[tex]=150[/tex]

[tex]180-150[/tex]

[tex]=30[/tex]

The interior angle is 150°, and the exterior angle is 30°.

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