8.) A regular hexagon (6-sided polygon) and a regular heptagon (7-sided polygon) have equal side lengths. When the two shapes are drawn such that they share one side, there will be three angles at each intersection. Determine the measure of the third angle. Draw a picture, explain your reasoning and show your calculations!

9.) Marietta wants to design her own tile pattern using three different shapes of regular polygons. All three tiles types have the same side length. She chose a pentagon and a square and needs you to figure out how many sides the third tile will have. Draw a picture, explain your reasoning and show your calculations!