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Interior angles of polygons

Author:Cameron Ualesi

Triangle

What is the sum of all the interior angles?

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Square

What is the sum of all the interior angles?

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Pentagon

What is the sum of all the interior angles?

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Hexagon

What is the sum of all the interior angles?

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Heptagon

What is the sum of all the interior angles?

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Have a look back at the answers you have picked. Can you recognize a pattern when adding an extra side?

What do you think the pattern is?

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Now have a ago at using this formula: Sum of interior angles = (n-2) x 180 See if you get the same answers.

Does the formula work only for regular polygons?

What kind of polygon is this?

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Add up all the angles and also use the formula. Do you get the same answers?

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