Similarity (Day 3)

Lesson Prep

Lesson Details

• Duration: 50 minutes

• Learning Goal: Develop understanding of why proving similarity with AA works and continue to build proficiency with application problems.

Prework

• Make sure you have Chromebooks or some other class set of technology.

Answer Keys

• Link to Answer Keys

Classwork

• Estimation – Dilation 4

• Warm Up

• Desmos Activity

  • Inspired by Fawn Nguyen

• Practice

Standards

Common Core

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

• 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