Through Math for America, I am part of an on-going collaboration with the New York Times Learning Network. My latest contribution, a Test Yourself quiz-question, can be found here:
http://learning.blogs.nytimes.com/2011/04/4/test-yourself-math-april-4-2011/
This question is based on the financial troubles facing the New York Mets, and their contributions to baseball’s revenue sharing pool.
Another installment from my Fun With Folding series: paper pyramids!
First, start with a triangular cut-out. Construct this triangle’s medial triangle by connecting the midpoints of each side. If you don’t have a ruler handy, just fold corner to corner, and crease in the middle to find the midpoint of each side!
Now, fold up the sides and tape them together!
The best part about this activity is that it doesn’t always work! Finding out which triangles this will work for, and which it won’t, leads to lots of good mathematical questions to explore!
Related Posts
Wow, is this fun: a graph theory-based game called Planarity.
Given a set of vertices and edges, your job is to untangle the graph so that no two edges intersect. In essence, you are proving that the given graph is indeed a planar graph.
If it takes you a long time to succeed, just tell your friends you got caught up thinking about questions like “How can I prove it’s always possible to untangle this graph?” and “I wonder how many more edges I could add while keeping this puzzle solvable?” That’s what I tell people.
Through Math for America, I am part of an on-going collaboration with the New York Times Learning Network. My latest contribution, a Test Yourself quiz-question, can be found here:
http://learning.blogs.nytimes.com/2011/03/23/test-yourself-math-march-23-2011/
This question is based on Apple’s total profits from the sales of iPads. Selling 15 million units at 25% profit really adds up!
Through Math for America, I am part of an on-going collaboration with the New York Times Learning Network. My latest contribution, a Test Yourself quiz-question, can be found here:
http://learning.blogs.nytimes.com/2011/03/16/test-yourself-math-march-16-2011/
This question is based on Google-search statistics, specifically how much traffic is driven to the top two Google search results.
Based on the numbers, it’s easy to see why companies are willing to bend the rules to climb the rankings!