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Geometry

(8 Units, 85 Lessons)

Unit 4 - Triangles and Congruence(11 Lessons)

Triangle Construction Site

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students use an online simulation to build triangles from sets of parts and discover minimum conditions for proving triangles congruent.

15 Resources

5 Favorites

15 Resources

5 Favorites

Proving Triangles Congruent

Geometry

» Unit:

Triangles and Congruence

Big Idea:Using flow diagrams to organize an argument highlights conditions for triangle congruence.

20 Resources

6 Favorites

20 Resources

6 Favorites

Introduction to Two-Column Proof

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students use triangle congruence to understand the reasoning behind an old-timer’s method for checking an assembly for ‘squareness’.

15 Resources

1 Favorites

15 Resources

1 Favorites

Applying Triangle Congruence

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students learn how proving triangles congruent can be used as part of a larger strategy in a proof.

18 Resources

5 Favorites

18 Resources

5 Favorites

Progress Check and Homework Review 1

Geometry

» Unit:

Triangles and Congruence

Big Idea:Student questions are the focus of the lesson as students grade their own homework and prepare for a homework quiz.

22 Resources

0 Favorites

22 Resources

0 Favorites

Reasoning About Constructions

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students reason about the geometry behind straight-edge and compass drawings. Deductions about constructions!

15 Resources

0 Favorites

15 Resources

0 Favorites

Verifying Properties of Constructions

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students use interactive geometry software to confirm their predictions about straight-edge and compass constructions. It's all done with triangles!

19 Resources

1 Favorites

19 Resources

1 Favorites

Proving Properties of Quadrilaterals 1

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students work in cooperative learning teams to complete scaffolded proofs. Why must a parallelogram have two pairs of congruent sides?

19 Resources

0 Favorites

19 Resources

0 Favorites

Proving Properties of Quadrilaterals 2

Geometry

» Unit:

Triangles and Congruence

Big Idea:Day Two of proving properties of quadrilaterals. Today is the day that most students will start to ‘get’ formal proofs.

15 Resources

0 Favorites

15 Resources

0 Favorites

Progress Check and Homework Review 2

Geometry

» Unit:

Triangles and Congruence

Big Idea:Student questions are the focus of the lesson as students grade their own homework and prepare for a homework quiz.

23 Resources

1 Favorites

23 Resources

1 Favorites

Triangle Congruence Unit Quiz

Geometry

» Unit:

Triangles and Congruence

Big Idea:Students show what they have learned about triangle congruence.

24 Resources

1 Favorites

24 Resources

1 Favorites