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Learning Goal
‹3 of 3 in this cluster
Establish AA similarity criterion
Start lessonBegins with AA criterion understanding and proof · Slides
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
Teacher tools for this standard
Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework
- Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
- Guided Notes →One page your students fill in and keep.
- Exit Ticket →Three items at the end of class. No student accounts.
- Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
- Homework →Assign practice; it grades itself.
HSG.SRT.A.3
**HSG.SRT.A.3**: Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.
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HSG.SRT.A.3: Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.
What you'll learn
- State the AA (Angle-Angle) criterion for triangle similarity
- Prove the AA criterion using properties of similarity transformations
- Apply the AA criterion to determine if two triangles are similar
- Explain why two pairs of equal angles are sufficient (don't need to check the third angle or sides)
- Distinguish between AA for similarity and ASA/AAS for congruence
- Use AA to solve problems involving similar triangles
Review first:
Slides
Step through the lesson, or watch it as a narrated video • 2 slide decks
1
AA criterion understanding and proof
✓ Start here2
AA criterion applications
Practice
Try it on your own
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