Today we began our polygons and algebra unit. This unit will be assessed on March 1516, right before spring break. The unit test may be as much as 90 pts. It is a 10 block unit.
Today we are discovering rules for find the sum of the interior angles of any polygon with "n" sides  180(n2). This is C32 on p 257. Attached below. We then figured out how to find one angle in an equiangular polygon: 180(n2)/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 2578: 312 and p 262:211. On #12, no need to copy sketch or show work. On all other problems, write down numbers that you put in the calculator.
Today we are discovering rules for find the sum of the interior angles of any polygon with "n" sides  180(n2). This is C32 on p 257. Attached below. We then figured out how to find one angle in an equiangular polygon: 180(n2)/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 2578: 312 and p 262:211. On #12, no need to copy sketch or show work. On all other problems, write down numbers that you put in the calculator.

