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Geometry

(13 Units, 90 Lessons)

Unit 3 - Developing Logic and Proof(9 Lessons)

Vertical Angles and Linear Pairs

Geometry

» Unit:

Developing Logic and Proof

Big Idea:You've gotta read between the lines! In this lesson, students examine angle pairs formed by intersecting lines and infer some general truth about them.

9 Resources

16 Favorites

9 Resources

16 Favorites

Conjecture is Not Enough: The need for proof

Geometry

» Unit:

Developing Logic and Proof

Big Idea:Stereotypes: True, False, or Somewhere in Between? In this lesson students explore the role that inductive reasoning plays in the creation of stereotypes, and the role it should play in debunking them.

9 Resources

8 Favorites

9 Resources

8 Favorites

Deductive Reasoning and Proof

Geometry

» Unit:

Developing Logic and Proof

Big Idea:True today, true tomorrow....but ALWAYS true? In this lesson, students learn how deductive reasoning is used to prove conjectures.

11 Resources

21 Favorites

11 Resources

21 Favorites

Developing Two-Column Proof Skills

Geometry

» Unit:

Developing Logic and Proof

Big Idea:Can we do better than all the king's horses and all the king's men?...in this lesson, students will pick up the broken pieces of classic proofs and restore them to their original condition.

8 Resources

6 Favorites

8 Resources

6 Favorites

Exploring Parallel Lines Cut By a Transversal

Geometry

» Unit:

Developing Logic and Proof

Big Idea:Why did the transversal cross the parallel lines?....To create angle relationships for us to learn about, of course. Find out more in this lesson.

10 Resources

23 Favorites

10 Resources

23 Favorites

Applying Postulates and Theorems Involving Parallel Lines Cut by a Transversal

Geometry

» Unit:

Developing Logic and Proof

Big Idea:It's not just solving for x; we have to think about 'why' too...In this lesson student solve problems related to parallel lines cut by a transversal and they justify their solutions.

10 Resources

1 Favorites

10 Resources

1 Favorites

Proving Theorems involving Parallel Lines Cut by a Transversal

Geometry

» Unit:

Developing Logic and Proof

Big Idea:I think therefore I prove...so that I know for sure. In this lesson, we turn our conjectures about parallel lines cut by a transversal into cold hard facts.

9 Resources

1 Favorites

9 Resources

1 Favorites

Making Conjectures about the Midsegments of a Triangle

Geometry

» Unit:

Developing Logic and Proof

Big Idea:

12 Resources

2 Favorites

12 Resources

2 Favorites

Proving Theorems About Triangles

Geometry

» Unit:

Developing Logic and Proof

Big Idea:Proof Power! In this lesson, students the theorems we've proven make it possible to prove a host of other theorems.

6 Resources

24 Favorites

6 Resources

24 Favorites