What is a rule for finding the sum all angles? What about a single angle measure?

Homework: 
Comp Corrections Due Wed

Due Tuesday 
L-40 pg. 53 #3-10
pg. 58 #23 



R-43 Write a Rule: If I know the sum of all the angles how can I figure out the single angle measure?

Sum of all angles Divided by # of sides = single angle measure



1. Devon's work: I created some irregular polygons and ripped off the sides. Is there a relationship between the # of sides and the angle of degree?

2. Trevor's work: I took some polygons, some are regular and some are irregular. Cut them in thirds, halves, fourths. Trying to make other shapes or triangles. (Angle measure for a triangle is always 180)

3. Casey's work: I made each side the base of a triangle. I also made the same number of triangles to match sides.

R-44 Write as many observations as you can. Can you find the relationship between the # of sides and degree angle?