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12 Terms

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5 properties of parallelograms

  1. Opposite sides are parallel , opposite sides are congruent opposite angles are congruent , consecutive angles are supplementary , diagnols bisect each other

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quadrilateral

4 sides

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pentagon

5 sides

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hexagon

6 sides

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heptagon

7 sides

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octagon

8 sides

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nonagon

9 sides

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decagon

10 sides

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dodecagon

12 sides

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(n-180)

formula to find the sum of interior angles

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360/n of sides

to find one of the sum for exterior angles

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