Covering Up (MatheMUSEments!)
Library Home || Full Table of Contents || Suggest a Link || Library Help
|Ivars Peterson (Math Muse for Kids)|
|Have you ever wondered why the cover of a manhole is nearly always round? Why couldn't it be oval or square? The usual answer is that a circular lid, unlike a square or an oval cover, won't fall through the opening, but the circle isn't the only shape that would work safely as a manhole cover. Another possibility is the Reuleaux triangle... [Produced 10 times a year by the publishers of Cricket magazine (in association with Smithsonian magazine), Muse features articles and activities for children 8 years old and up.]|
|Levels:||Late Elem. (3-5), Middle School (6-8), High School (9-12), College|
|Math Topics:||Conic Sections and Circles|
© 1994- The Math Forum at NCTM. All rights reserved.