Interior Angles in Polygons - University of Kentucky



Interior Angles in Polygons

Fill in the Blanks:

1. The sum of the interior angles in a triangle is ______________ degrees.

2. The sum of the interior angles in a quadrilateral is _____________ degrees.

a. This means a quadrilateral has ________ triangles in it.

3. The sum of the interior angles in a pentagon is _______________ degrees.

a. This means a pentagon has ___________ triangles in it.

4. Fill in the chart below:

|Number of Sides: |Number of Triangles: |Sum of Interior Angles: |

|3 | | |

|4 | | |

|5 | | |

5. Find the pattern used to compute the sum of the interior angles in a polygon from the chart above. What is the formula used to find the sum of the interior angles in any polygon?

6. Fill in the chart below:

|Number of Sides: |Number of Triangles: |Sum of Interior Angles: |

|6 | | |

|8 | | |

|9 | | |

|10 | | |

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