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Sum of Interior Angles (Pentagons)

Author:Darrell Hardaway Jr.

Triangles

Triangles

What is the sum of the triangle's interior angles?

Select all that apply
  • A
  • B
  • C
  • D
Check my answer (3)

Triangles: Move point B to (4, 4)

After you moved Point B to the coordinates (4, 4),

What is the new sum of the interior angles?

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COPY this in your Math Notebook

COPY this in your Math Notebook

Creating a Quadrilateral

Creating a Quadrilateral

A quadrilateral is made up of __ triangles

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  • A
  • B
  • C
  • D
Check my answer (3)

Creating a Quadrilateral

What did you notice about the two triangles?

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  • A
  • B
  • C
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Based on the answer above...

What do you think is the sum of the interior angles of a quadrilateral?

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  • A
  • B
  • C
  • D
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Creating a Pentagon

Creating a Pentagon

How many triangles make up the pentagon?

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  • A
  • B
  • C
  • D
Check my answer (3)

Pentagons: Based on your previous answer...

What is the sum of the interior angles of a pentagon? (Answer in a complete sentence)

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Sum of the Interior Angles of a Polygon

Sum of the Interior Angles of a Polygon
Start from one point only, Cut the shape into triangles Multiply the number of triangles by 180 The product = The sum of interior angles

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