Concept Quiz: Similarity

Lesson Prep

Lesson Details

• Duration: 50 minutes

• Learning Goal: Assess conceptual understanding and procedural fluency for similarity.

• Students have the entire class period to finish the quiz.

Prework

• Make sure you have a class set of compasses for constructions

• Consider joining our free online workshop to learn more about Standards Based Grading

Classwork

• Concept Quiz

Finished Early?

• Triangle Inequality Theorem

  • Answers

• Constructions Challenge (Lisa Bejarano)

• Minute to Win It – This Blows

Standards

Common Core

• HSG.SRT.A – Understand similarity in terms of similarity transformations

• HSG.SRT.B.4 – Prove theorems about triangles. Theorems include: a line parallel to one side of a triangle divides the other two proportionally, and conversely; the Pythagorean Theorem proved using triangle similarity.

• HSG.SRT.B.5 – Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

TEKS

• G.7(A) – apply the definition of similarity in terms of a dilation to identify similar figures and their proportional sides and the congruent corresponding angles

• G.7(B) – apply the Angle-Angle criterion to verify similar triangles and apply the proportionality of the corresponding sides to solve problems

• G.8(A) – prove theorems about similar triangles, including the Triangle Proportionality theorem, and apply these theorems to solve problems