Dobbins Middle School - 8th Grade Math

Welcome to my 8th grade math blog.


It will serve as my primary means of keeping you informed about your child's math class. I encourage you to visit often to stay abreast as we move through the 8th grade Common Core Georgia Performance Standards (CCGPS).



Sunday, August 19, 2012

Week at A Glance: August 20, 2012

This week in math, we will wrap up the first part of Unit 1A Geometric Transformations. Students will take a test on rigid transformations (translations, rotations and reflections). They will need to be able to identify and perform indicated transformations and explain how they impact the coordinates of the original figure (pre-image). Students in advanced math will take the test on Monday and all other classes will take the test on Tuesday.

By midweek, we will move on to the second part of Unit 1A. In this portion of the unit, students will study dilations, which is another type of geometric transformation. Students will identify, create and analyze dilations of geometric figures. We will also study congruence and similarity in this part of the unit. Students will need to be able to differentiate between transformations that result in images that are congruent to the original and those that result in images that are similar to the original.

Students need to be familiar with the familiar with the following key terms for this unit:

  • dilation
  • factor
  • proportion
  • ratio
  • congruence
  • similarity
  • corresponding sides
  • corresponding angles
  • translation
  • rotation
  • reflection
  • line of symmetry
  • line of reflection
  • point of rotation
  • general form








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