To supplement this exercise, we did some work with "old school" Geoboards. The challenges, and they went from easy to being a little more complex, are captured in some of the photos:
Most of the students were not aware that the formula for calculating the perimeter of a rectangle. This is something we will use in this unit of Math. It is: P = 2(l+w).
Here is a screenshot of a calculation we did as a class from the mathplayground game:
|Using the formula to calculate the area|
|I did some scaffolding with the more complex portion of the work. This involved creating different shapes with the same perimeter.|
Introductory review of the Circumference of a circle: http://www.factmonster.com/math/knowledgebox/player.html?movie=sfw41551
To support this Grade 8 investigation, we were looking at the relationship between the circumference of a circle and the diameter of a circle. Here are some photos of our investigations: