Concept Quiz: Dilations

Lesson Prep

Lesson Details

• Duration: 50 minutes

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

• 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

  • 1st 90 level question taken from John O’Malley IV.

• Retake: Properties of Parallelograms

Finished Early?

• Constructions Challenge (Lisa Bejarano)

• Minute to Win It – Baby Rattle

Standards

Common Core

• HSG.CO.A.2 – Represent transformations in the plane using, e.g., transparencies and geometry software; describe transformations as functions that take points in the plane as inputs and give other points as outputs. Compare transformations that preserve distance and angle to those that do not (e.g., translation versus horizontal stretch).

TEKS

• G.3(B) – determine the image or pre-image of a given two-dimensional figure under a composition of rigid transformations, a composition of non-rigid transformations, and a composition of both, including dilations where the center can be any point in the plane

• G.3(C) – identify the sequence of transformations that will carry a given pre-image onto an image on and off the coordinate plane