Today we are discovering rules for find the sum of the interior angles of any polygon with "n" sides - 180(n-2). This is C-32 on p 257. Attached below. We then figured out how to find one angle in an equiangular polygon: 180(n-2)/n
Then we looked at mathopenref and an animation and a proof to come to the understanding that the sum of a set of exterior angles of any polygon is 360 degrees.
We wrote up the three conjectures attached below.
Then we practiced what to do algebraically if given a sum or an angle and asked to find the number of sides of the polygon.
HW #14: p 257-8: 3-12 and p 262:2-11. On #12, no need to copy sketch or show work. On all other problems, write down numbers that you put in the calculator.