Sum of the Interior Angles in a Pentagon


Connect vertex A to every other vertex in the polygon with a segment by moving the red sliders all the way to the right

Think About and Answer the Following Questions

What do you remember about the sum of the angles in a triangle?

How many sides does a pentagon have?

How many triangles were you able to create in the pentagon above?

What might you guess then would be the sum of all the angles in a pentagon?