Similarity (Day 7)
Lesson Prep
Lesson Details
Duration: 50 minutes
Learning Goal: Give students individual time to practice and solidify understanding of similarity and preview our upcoming right triangle unit.
Prework
Make sure you have Chromebooks or some other class set of technology.
Answer Keys
Classwork
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