## Change Angles

## Work Time

# Change Angles

- Explore the angles of the given polygons by dragging the vertices to change the angles.
- Predict what the sum of the angles will be as you change each polygon. Then select the Show Angle Sum buttons to check your prediction.
- Does the angle sum change as the figure is changed?
- How many acute angles can each figure have? How many obtuse angles can each figure have?

INTERACTIVE: Polygon Angle Sum

## Hint:

Compare the number of sides in the polygon to the angle sum. By how many degrees does the angle sum increase for each additional polygon side?