Google Classroom
GeoGebraGeoGebra Classroom

Sum of Interior Angles (Pentagons)

Author:
Darrell Hardaway Jr.
Topic:
Angles, Geometry

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?

Check my answer

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

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

Creating a Quadrilateral

What did you notice about the two triangles?

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

Based on the answer above...

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

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

Creating a Pentagon

Creating a Pentagon

How many triangles make up the pentagon?

Select all that apply
  • 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)

Check my answer

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

New Resources

Discover Resources

Discover Topics