Coins in a Circle
68
skips
skips
32
questions
questions
Act One
Act Two
 Teacher noteActually, the size of the coin is not really as important in this stage as in the sequel later on.
â€¢ Diameter of a 10cent Singapore coin = 18.5 mm
â€¢ Diameter of black rug = 22 inches
Method is to have students used various sizes of circles and work out how many coins will fit into these sizes, then build a quadratic model for the data. Building the model can be done using a spreadsheet program or any other process, but the hope is that students recognize that the data is NOT linear.  ImageCoin is 18.5mm = 0.728 inches
 ImageRug is 22 in = 558.8 mm
Act Three
 VideoThe count
Sequel
 1.
How many of these bigger dots will fit?
 VideoBig Spots in a Circle
 VideoFilling the perimeter Act 1 by HS Students
 VideoFilling the perimeter Act 3
 ImageCenter Circle Measure  From outside
 VideoFilling Perimeter Act 1 by Aaron
show 32 more questions


Why is it when we have more area do round objects fit inside? What would happen if we used dimes?














What's the radius of a quarter, and do you use that to figure out how many quarters around you can fit if you know the lid's circumference?



What pattern changes can you identify as the size of the container increases?










What is the purpose of this activity? It does not use area of circle formula  because of so much opened areas...


What is the ratio of the value of the coins in the small circle to the medium circle?

Comments
Join or sign in to leave a comment.