Lesson 4: 2.4 Proving Lines Parallel
Duration of Days: 4
Lesson Objective
Use angle properties to prove lines are parallel
Is the converse of a true statement always true?
Converse
CCSS.G.CO.C.9
I DO: Introduce simple "If-Then" logic statements (If the angles match, then the lines are parallel).
WE DO: Look at dynamic models in GeoGebra. We will adjust transversal angles and watch the lines become parallel or intersect.
YOU DO: Complete 5 verbal or written proofs utilizing the converse properties.
Introduction to logical reasoning and defending an argument with math facts.
DOK 2-3 (Strategic Thinking)
Support (Low): Provide fill-in-the-blank proof templates.
Formative Assessment
Digital dynamic software