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The sum of the Interior Angles of a Pentagon

Pentagon

How many Sides does a Pentagon have ?

What is the sum of the interior angles?

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Use the Toolbar of the pentagon above to determine how many triangles are in one Pentagon.

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What is angle measurements of any Triangle ?

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Use the Toolbar to divide the Pentagon into lines of symmetry.

How many symmetrical lines were you able to create in one Pentagon ?

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After dividing the Pentagon into lines of symmetry. How many triangles were created?

What is the size of one angle at the center of a regular pentagon (five-sided polygon)?

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