finish 9.1.1
9.1.2: 14-18, 21-23, 25
Don't spend too much time on 14--5 min or so, then move on. On 15, you want to print out the resource pages--just do one or two, you don't need to do all 4!--and cut out the triangles. You can then rearrange and fit the angles of the triangles together to help you find the measures of the angles. Don't spend too much time on this activity either--15 min at the most, including cutting out the triangles. Then go to this etool https://www.desmos.com/calculator/3i7k3ydarb for #16--move the triangle around to create the triangles from the resource page(s) and see what you discover about the angles of a triangle.
9.1.3: 27-30, 33, 34, 36