*Chapter 9*

Our next unit of study will be on spatial thinking, with a focus on angle relationships and calculating the sum of the angles in various polygons. By the end of the unit, all students will be able to identify and perform calculations pertaining to supplementary, complementary, vertical, alternate interior, alternate exterior, and corresponding angles. Students will also be able to calculate the sum of the angles in a polygon and the angle measurement of each angle in a regular polygon. Students will also be able to work backwards to find the number of sides a polygon has given the sum of the angles. As always, worksheets and videos on these topics will be available under the resources tab.