Warm up was to critique several proofs of the alternate interior angles theorem. Looked over homework, then worked on complicated 4 line proofs in groups on whiteboards. Passed out practice assessment.
Homework
complete the practice assessment (blank copy) (SOLUTIONS)
Assessment is next class
Resources
Converse and contrapositive: link
proving vertical angles congruent: link
proving angle relationships with a paragraph: link
proving lines parallel with a paragraph: link
proving lines parallel: link
determine if equations graph parallel, perpendicular lines or neither: link
graph a line perpendicular to given line, through given point: link
finding equation of a line through given point parallel to given line: link
Warm up was another proof for proving lines parallel. Went over practice assessment in small groups, then took assessment. Started triangle angle sum theorem discussion with hands on exploration and proved theorem using the parallel postulate and alternate interior angles.
Notes from board
Homework
watch and take notes on this video: link