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Introducing proofs in Geometry can be difficult. This product contains simple geometric proofs that you can use with your students while they begin to explore the process of writing their own two-column proofs. There is a quick review of the contents that students will need to know before beginning the proofs. Then, they will finish a few proofs that have statements listed by writing the reason for each statement. Finally, they will write a few two-column proofs of their own.

This bundle contains the following products:

**Introduction to Proofs**

**Simple Proofs with Parallel Lines**

**Simple Proofs with Quadrilaterals**

**Simple Proofs with Triangles**

**Simple Proofs with Similarity and Proportion**

These math journal and/or note-taking activities can be used for introduction of topics or to reflect/review what you have covered in class discussion. The problems listed in this activity packet build nicely on each other if introduced in the order that they appear. Our students enjoy filling them out and organizing them in their math journals so that they can refer back to them throughout the year. These activities are a great way to promote writing in math. Keys for scaffolded notes are included for reference.

**With the exception of Introduction to Proofs, these products are not included in our Geometry Bundle. This is a new product line.

Scaffolded Note Sheets with Sample Teacher Keys are included for the following topics:

What is a proof?

Formal Proofs (Two-Column Proofs)

Steps for Writing a Formal Proof

Example of an Informal Proof Using Algebra

Review: Properties of Equality for Real Numbers

Which property justifies the statement?

Simple Algebra Problems: Solve and Justify

Justifying the Steps for Algebra Problems

Solve and Justify the Steps for Each Algebra Problem

Write it Out: Simple Proof with Segment Addition

Cut it Out: Simple Proof with Segment Addition

Write it Out: Informal Proof (Segment Addition)

Cut it Out: Writing a Two-Column Proof (Segment Addition)

Write it Out: Simple Proof with Angle Addition

Cut it Out: Simple Proof with Angle Addition

Write it Out: Informal Proof(Angle Addition)

Cut it Out: Writing a Two-Column Proof (Angle Addition)

Your Turn: Simple Proof with Complementary Angles

Your Turn: Writing a Two-Column Proof (Supplementary Angles)

Solving for Variables 1-Parallel Lines Cut by a Transversal

Preparing for Your Proof#1

Solving for Variables 2-Parallel Lines Cut by a Transversal

Preparing for Your Proof#2

Solving for Variables 3-Parallel Lines Cut by a Transversal

Preparing for Your Proof #3

Practice #1 Writing a Two-Column Proof

Practice #2 Writing a Two-Column Proof

Practice #3 Writing a Two-Column Proof

Solving for Variables – Proving the Angles of a Triangle have a sum of 180°

Preparing for Your Proof: Proving the Angles of a Triangle have a sum of 180°

Solving for Variables – Similar Right Triangles

Preparing for Your Proof: Similar Right Triangles

Solving for Variables – Exterior Angle Theorem

Preparing for Your Proof: Exterior Angle Theorem

Solving for Variables with Congruent Triangles 1

Preparing for Your Proof: Congruent Triangles 1

Solving for Variables with Congruent Triangles 2

Filling in the Blanks Two-Column Proof-Congruent Triangles

Corresponding Parts of Congruent Triangles are Congruent

Preparing for Your Proof: CPCTC

Reviewing Parallelograms

Preparing for Your Proof - Parallelogram

Reviewing Parallelograms Part 2

Preparing for Your Proof- Another Parallelogram

Reviewing Rectangles

Preparing for Your Proof- Rectangles

Reviewing Parallelograms and Rhombi

Preparing for Your Proof – Parallelograms and Rhombi

Reviewing Trapezoids and Parallelograms

Preparing for Your Proof – Trapezoids and Parallelograms

Mini Quadrilateral Quick Reference

Quadrilateral Proof Review Page

Reviewing Similar Triangles in a Trapezoid

Preparing for Your Proof - Similar Triangles in a Trapezoid

Reviewing Right Triangle Similarity

Preparing for Your Proof - Similarity in Right Triangles

Reviewing Triangle Similarity and Parallel Lines

Preparing for Your Proof-Triangle Similarity and Parallel Lines

Reviewing Similarity in Triangles with Altitudes

Preparing for Your Proof-Similarity in Triangles with Altitudes

Reviewing Similarity in Triangles with Medians

Preparing for Your Proof-Similarity in Triangles with Medians

Similarity and Proportion Proof Review Page

Plus 2 Interactive Math Notebook Foldable Activities. Please check out our preview for a closer look!

** Geometry Bundle**

**Other Geometry Activities**

**If you like what you see, please click on the "Follow Me" star to learn about new products, sales, and more!

How to earn TPT Credits:

"Earn TpT Credits for purchases on TpT. You get one TpT Credit for every $ you spend on TpT. Thing is, you only get the Credits after you Provide Feedback -- both a fair rating and a fair comment -- on the items that you purchase. We will round up for you, too! If you provide fair feedback on a $4.75 item, you will earn 5 credits. Every 100 Credits is worth $5 that you can apply towards future TpT purchases, but there is no need to wait until you have 100 to redeem them. 50 credits is worth $2.50, for example."--TPT Credits Page

This bundle contains the following products:

These math journal and/or note-taking activities can be used for introduction of topics or to reflect/review what you have covered in class discussion. The problems listed in this activity packet build nicely on each other if introduced in the order that they appear. Our students enjoy filling them out and organizing them in their math journals so that they can refer back to them throughout the year. These activities are a great way to promote writing in math. Keys for scaffolded notes are included for reference.

**With the exception of Introduction to Proofs, these products are not included in our Geometry Bundle. This is a new product line.

Scaffolded Note Sheets with Sample Teacher Keys are included for the following topics:

What is a proof?

Formal Proofs (Two-Column Proofs)

Steps for Writing a Formal Proof

Example of an Informal Proof Using Algebra

Review: Properties of Equality for Real Numbers

Which property justifies the statement?

Simple Algebra Problems: Solve and Justify

Justifying the Steps for Algebra Problems

Solve and Justify the Steps for Each Algebra Problem

Write it Out: Simple Proof with Segment Addition

Cut it Out: Simple Proof with Segment Addition

Write it Out: Informal Proof (Segment Addition)

Cut it Out: Writing a Two-Column Proof (Segment Addition)

Write it Out: Simple Proof with Angle Addition

Cut it Out: Simple Proof with Angle Addition

Write it Out: Informal Proof(Angle Addition)

Cut it Out: Writing a Two-Column Proof (Angle Addition)

Your Turn: Simple Proof with Complementary Angles

Your Turn: Writing a Two-Column Proof (Supplementary Angles)

Solving for Variables 1-Parallel Lines Cut by a Transversal

Preparing for Your Proof#1

Solving for Variables 2-Parallel Lines Cut by a Transversal

Preparing for Your Proof#2

Solving for Variables 3-Parallel Lines Cut by a Transversal

Preparing for Your Proof #3

Practice #1 Writing a Two-Column Proof

Practice #2 Writing a Two-Column Proof

Practice #3 Writing a Two-Column Proof

Solving for Variables – Proving the Angles of a Triangle have a sum of 180°

Preparing for Your Proof: Proving the Angles of a Triangle have a sum of 180°

Solving for Variables – Similar Right Triangles

Preparing for Your Proof: Similar Right Triangles

Solving for Variables – Exterior Angle Theorem

Preparing for Your Proof: Exterior Angle Theorem

Solving for Variables with Congruent Triangles 1

Preparing for Your Proof: Congruent Triangles 1

Solving for Variables with Congruent Triangles 2

Filling in the Blanks Two-Column Proof-Congruent Triangles

Corresponding Parts of Congruent Triangles are Congruent

Preparing for Your Proof: CPCTC

Reviewing Parallelograms

Preparing for Your Proof - Parallelogram

Reviewing Parallelograms Part 2

Preparing for Your Proof- Another Parallelogram

Reviewing Rectangles

Preparing for Your Proof- Rectangles

Reviewing Parallelograms and Rhombi

Preparing for Your Proof – Parallelograms and Rhombi

Reviewing Trapezoids and Parallelograms

Preparing for Your Proof – Trapezoids and Parallelograms

Mini Quadrilateral Quick Reference

Quadrilateral Proof Review Page

Reviewing Similar Triangles in a Trapezoid

Preparing for Your Proof - Similar Triangles in a Trapezoid

Reviewing Right Triangle Similarity

Preparing for Your Proof - Similarity in Right Triangles

Reviewing Triangle Similarity and Parallel Lines

Preparing for Your Proof-Triangle Similarity and Parallel Lines

Reviewing Similarity in Triangles with Altitudes

Preparing for Your Proof-Similarity in Triangles with Altitudes

Reviewing Similarity in Triangles with Medians

Preparing for Your Proof-Similarity in Triangles with Medians

Similarity and Proportion Proof Review Page

Plus 2 Interactive Math Notebook Foldable Activities. Please check out our preview for a closer look!

**If you like what you see, please click on the "Follow Me" star to learn about new products, sales, and more!

How to earn TPT Credits:

"Earn TpT Credits for purchases on TpT. You get one TpT Credit for every $ you spend on TpT. Thing is, you only get the Credits after you Provide Feedback -- both a fair rating and a fair comment -- on the items that you purchase. We will round up for you, too! If you provide fair feedback on a $4.75 item, you will earn 5 credits. Every 100 Credits is worth $5 that you can apply towards future TpT purchases, but there is no need to wait until you have 100 to redeem them. 50 credits is worth $2.50, for example."--TPT Credits Page

Total Pages

90+

Answer Key

N/A

Teaching Duration

N/A

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