Embedded Files
Chapter 3: Section Outline
Chapter 3: Section Outline
3.1 Pairs of Lines and Angles
3.2 Parallel Lines and Transversals
3.3 Proofs with Parallel Lines
3.4 Proofs with Perpendicular Lines
3.5 Slopes of Lines
3.6 Equations of Parallel and Perpendicular Lines
Section Objectives
Section Objectives
3.1 – Pairs of Lines and Angles
Students will identify relationships between lines (parallel, perpendicular, skew) and classify angles formed by transversals (G.2A, G.5A).
3.2 – Parallel Lines and Transversals
Students will apply theorems about angles formed by parallel lines and a transversal to find angle measures and justify relationships (G.5B, G.6A).
3.3 – Proofs with Parallel Lines
Students will use deductive reasoning to prove geometric relationships involving parallel lines and angle measures (G.5D, G.6A).
3.4 – Proofs with Perpendicular Lines
Students will prove theorems about perpendicular lines and apply them to solve geometric problems (G.5D, G.6A).
3.5 – Slopes of Lines
Students will determine the slope of lines, compare slopes to identify parallel and perpendicular relationships, and apply these concepts to geometric situations (G.2B, G.2C).
3.6 – Equations of Parallel and Perpendicular Lines
Students will write equations of lines parallel or perpendicular to a given line through a specified point and justify their solutions (G.2C, G.6A).
TABLE OF CONTENTS:
TABLE OF CONTENTS:
📚 Not sure where to start? Click the section titles to access lessons, practice, and tools in one click.
📚 Not sure where to start? Click the section titles to access lessons, practice, and tools in one click.
Note Library
Note Library
Need a fresh copy of your notes? Click the buttons to download a PDF for each section.
Need a fresh copy of your notes? Click the buttons to download a PDF for each section.
These are the same guided notes we use in class—perfect for staying organized or catching up after an absence.
Independent Practice
Independent Practice
Practice assignments will appear here after we complete each lesson.
Practice assignments will appear here after we complete each lesson.
They may be worksheets or textbook problems, depending on the topic. Check back regularly to stay on track—no early access to homework!
💡 Remember: Always attempt the work on your own before checking the answers. These keys are here to support your learning—not replace it!
Textbook Library
Textbook Library
Access the textbook pages we’re using in class by clicking the buttons.
Access the textbook pages we’re using in class by clicking the buttons.
These pages match your Big Ideas Math textbook and are great for reviewing examples, completing assignments, or getting extra practice at home.
Video Resources
Video Resources
Watch the videos linked below for step-by-step examples, topic reviews, and helpful tips.
These videos align with what we’re learning in class and are great for getting ahead, extra support, review, or catching up if you’ve been absent.
HG+3.1,+3.2+Lines+and+Angles,+Parallel+Lines+and+Transversals.mp43.1 / 3.2
HG+3.3,+3.4+Proofs+with+Parallel+and+Perpendicular+Lines.mp43.3 / 3.4
Lesson_3.5_and_3.6.wmv3.5 / 3.6
Note Answer Keys
Note Answer Keys
Missed something in class or were absent? Answer keys will be posted here at the end of the day we complete a lesson.
Missed something in class or were absent? Answer keys will be posted here at the end of the day we complete a lesson.
Use them to review, fill in anything you missed, and make sure your notes are complete and accurate.
Click on the section titles to jump to the notes you need. You can scroll through without opening a new window. Slides also include a home button to return to the main page for easy navigation.
Extra Materials & Resources
Extra Materials & Resources
Looking for more ways to practice or dive deeper? This section includes optional review sheets, challenge problems, formula reference pages, and other helpful tools to support your success in Algebra 1. Use these resources to strengthen your understanding or get ahead!
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