Q2, W6: December 14-18 Geometry

TeacherKristin Andreason
Subject AreaGeometry Honors
Grade Level8
Week #December 14-18
Unit of InstructionUnit 3: Similarity
Standard(s) Taught

MAFS.912.G-SRT.1.1: Verify experimentally the properties of dilations given by a center and a scale factor:

    a) A dilation takes a line not passing through the center of the dilation to a parallel line, and leaves a line passing through the center unchanged.

    b)  The dilation of a line segment is longer or shorter in the ratio given by the scale factor.

Learning Targets and Learning Criteria
  • use dilations to prove similar figures.
  • define dilation (clarify that dilations are not rigid motions).
  • use real-world applications of dilations.
  • perform a dilation with a given center and scale factor on a figure in the coordinate plane.
  • verify that when a side passes through the center of dilation, the side and its image lie on the same line.
  • verify that corresponding sides of the pre-image and images are parallel.
  •  verify that a side length of the image is equal to the scale factor multiplied by the corresponding side length of the pre-image.
Classroom Activities


  1. Students will log onto Zoom session
  2. Students will take notes on Dilations in their ISN
  3. We will do some problems from the Math Nation practice book (p. 78)
  4. Students will do IXL’s L.13 and L.14
  5. Students will do select problems from practice book on pages 80-81


  1. Students will log onto Zoom session
  2. Students will take notes on Dilations around a point not the origin
  3. We will do a few examples from the practice book together


  1. Students will log onto the Zoom session
  2. Students will do Dilations Task Cards
Assignments Due
  • IXL’s L.13 and L.14
  • Dilations Task Cards
Additional Resources

All IEP and ESOL accommodations are provided daily.