Warm Up
Scale of the solar system. Watch movie:
https://www.youtube.com/watch?v=Kj4524AAZdE
Perimeter
Introduce perimeter of a square and a rectangle. How do we define a rectangle and a square? How many side lengths of a rectangle do you need to know to calculate the perimeter?
Puzzle
Cows in a field game
Homework puzzle
You need to capture precisely 4 gallons of water for some unknown experiment that requires precisely 4 gallons of water. The tools available to you are a 3 gallon container, a 5 gallon container and an unlimited water source that allows you to fill the 5 and 3 gallon containers. How would you fill the containers to get precisely 4 gallons of water?
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