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Geometry

(14 Units, 97 Lessons)

Unit 7 - Proofs about Triangles(11 Lessons)

Triangle Inequality Theorem Investigation

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students investigate and make conclusions about sets of potential sides of triangles in order to discover the triangle inequality theorem.

13 Resources

17 Favorites

13 Resources

17 Favorites

Side-Side-Side

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will write formal proofs showing how triangles are congruent when all three corresponding sides are congruent.

13 Resources

2 Favorites

13 Resources

2 Favorites

Angles of Triangles

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will use paper triangles to perform informal proofs about the sum of the interior angles and exterior angles of triangles.

19 Resources

1 Favorites

19 Resources

1 Favorites

Relationships between Angles and Sides of a Triangle

Geometry

» Unit:

Proofs about Triangles

Big Idea:This lesson gives students the opportunity to discover the relationship between the sides and angles of a triangle through a hands-on activity.

16 Resources

2 Favorites

16 Resources

2 Favorites

Applying Triangle Angle Theorems

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students use their knowledge of theorems from this unit to find the measures of angles in a complex diagram involving triangles.

17 Resources

0 Favorites

17 Resources

0 Favorites

Side-Angle-Side

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will write formal proofs showing how triangles are congruent when two corresponding sides and the included angle are congruent.

17 Resources

1 Favorites

17 Resources

1 Favorites

Angle-Side-Angle

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will write formal proofs showing how triangles are congruent when two corresponding angles and the included side are congruent.

18 Resources

3 Favorites

18 Resources

3 Favorites

CPCTC

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will use their knowledge of the ASA, SAS and SSS postulates to prove corresponding parts of congruent triangles are congruent.

14 Resources

8 Favorites

14 Resources

8 Favorites

Additional Properties of Triangles

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will use Geometer's Sketchpad to investigate properties of a triangle's mid-segment and median. They will also investigate properties of isosceles triangles.

13 Resources

0 Favorites

13 Resources

0 Favorites

Properties of Isosceles Triangles

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will create a graphic organizer with the properties of isosceles triangles in order to write proofs.

19 Resources

0 Favorites

19 Resources

0 Favorites

Properties of Isosceles Triangles Alternative Lesson with Dynamic Geometry Software

Geometry

» Unit:

Proofs about Triangles

Big Idea:Students will use Geometer's Sketchpad to discover properties of isosceles triangles, which they will use to create a graphic organizer and to write proofs.

22 Resources

1 Favorites

22 Resources

1 Favorites