IA2.GR.A: Reason about transformations and similarity.

Reason about transformations and similarity.

IA2.GR.A.1Describe the effect of dilations on two-dimensional figures using coordinates, including how scale factor and center of dilation impact side lengths and angle measures.IA2.GR.A.2Use similarity transformations to determine and justify triangle similarity. a. Determine whether two triangles are similar by identifying a sequence of similarity transformations (rotations, reflections, translations, and dilations) that relates one triangle onto another and aligns corresponding parts. b. Justify triangle similarity by explaining how similarity transformations establish that corresponding angles are congruent and corresponding sides are proportional.IA2.GR.A.3Apply properties of similar triangles to solve geometric problems in context.IA2.GR.A.4Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.

1-on-1 AI tutoring aligned to IA2.GR.A. Instant help for students, real-time insights for teachers.

Used in classrooms by 100,000+ students at Baltimore County, Plano ISD, Deer Valley USD, KIPP, and districts nationwide.

Free for teachers, forever →