NCLS has its 2nd Math Competition today.
We group students based on their regular school grades. All students take an individual round test with 50 minutes. Then Grade 3 – 5 students take a spring round test for 40 minutes while higher graders take a theme round test.
We will have winners from each grade group, announced later.
Plan change.
School has decided to have a school wide math contest on 4/28/2013 and all Math class students will take part in this contest. As such, we have decided to use the contest in place of the midterm exam.
So, we didn’t have the exam today. Instead we finish the chapter on transformations.
Up to now the three kinds of transformations we have talked about, Reflection, Rotation, and Translation, all do not change the figure’s shape and size. They are called rigid transformation. Today we talk about enlargement where the shape remains but the size changes. And an enlargement transformation can increase (when the scale fact is bigger than 1) and reduce (when the scale factor is less than 1) the size. And there must be a center of enlargement.
Lastly, we talked about the combination of multiple transformations and how to identify each transformation involved and fully describe it.
Homework:
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