Integrated Math II · Week 24 · Similarity and Right Triangle Trigonometry
Proving Similarity
AA similarity and how much evidence a conclusion needs.
- Students will
- Students use the AA criterion to decide whether triangles are similar and use similar triangles to find an unknown length.
- SEL skill
- Decide how much evidence is enough before reaching a conclusion
- What it looks like
- Students ask how much evidence a conclusion needs and use their emotions to slow down before deciding.
- Content focus
- Proving similarity with AA
- Format
- Collaborative analysis
Responsible decision-making
Responsible decision-making is choosing what to do by weighing safety, fairness, and what is likely to happen next. More responsible decision-making activities
What you get
A teacher guide with what to say, step by step, plus student pages and a supports page for students with diverse learning needs, including those with IEPs. Print or Project it, or assign it in Google Forms and Google Docs for Google Classroom. Your first 10 activities are free.
Standards
- G-SRT.5: High School Geometry: Similarity, Right Triangles, and Trigonometry, standard 5
- Standard for Mathematical Practice: MP3 Construct viable arguments and critique the reasoning of others
- CA Mathematics Framework (2023): Discovering Shape and Space
- Traditional course: Geometry
Fits these textbook chapters
- CCSS Integrated Pathway Mathematics II, Unit 5: Similarity, Right Triangle Trigonometry, and Proof
- Carnegie Learning Integrated Math II, Module 2: Investigating Proportionality
- CPM Core Connections Integrated II, Chapter 2: Justification and Similarity
- Savvas enVision Integrated Mathematics II, Topic 7: Relationships in Triangles
- Savvas enVision Integrated Mathematics II, Topic 9: Similarity and Right Triangles
Textbook names are used only to help you find activities that fit what you teach. RoseThread Connect is not affiliated with these publishers.
More responsible decision-making activities for Integrated Math II
- Rational or Not? Responsible decision-makingStudents argue whether sums and products are rational, practicing evidence over gut feeling.
- The Quadratic Formula Responsible decision-makingChoosing the best solving method and explaining the decision.
- Comparing Growth Responsible decision-makingExponential eventually beats linear; comparing two savings plans.
- Conditional Thinking Responsible decision-makingGiven that changes probability; how context changes the meaning of a claim.
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RoseThread Connect activities are drafted with the help of AI and shaped by educators. Students never have to share anything personal. Our five SEL skills are informed by CASEL's SEL Framework; RoseThread Learning is not affiliated with or endorsed by CASEL.