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17 August 1998 Vol. 3, No. 33 THE MATH FORUM INTERNET NEWS Geometric Figures: Formula FAQ | POW Mentor Project | Math in the Movies GEOMETRIC FIGURES: FORMULA FAQ - "Dr. Rob" Ward http://mathforum.org/dr.math/faq/formulas/ To find formulas for ellipses and ellipsoids, polygons and polyhedra, consult this new Frequently Asked Questions unit by "Dr. Rob," a 'math doctor' and volunteer administrator for the Math Forum's interactive project, Ask Dr. Math. Diagrams and some applets accompany formulas for two- and three-dimensional figures: triangle rectangular parallelepiped equilateral cube isosceles prism right pyramid scalene square pyramid quadrilateral pyramid frustum general quadrilateral regular polyhedron square tetrahedron rectangle cube parallelogram octahedron rhombus dodecahedron trapezoid icosahedron kite cylinder cyclic quadrilateral right circular cylinder cyclic-inscriptable cone regular polygon right circular cone circle cone frustum arc sphere segment sector sector cap ellipse segment, zone parabolic segment lune ellipsoid circular torus spherical polygon Links to other useful sites and a page on defining geometric figures are also included: http://mathforum.org/dr.math/faq/formulas/faq.figuredef.html -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- BE A MATH FORUM MENTOR: VOLUNTEER FOR PROBLEMS OF THE WEEK http://mathforum.org/pow/ Mentoring is a rewarding experience that can help your students enhance their communication skills as they discuss problem-solving techniques. The Math Forum's Problems of the Week (POWs) are designed to provide creative, non-routine challenges for students, who are encouraged to explain their solutions and receive individual responses from mentors. The success of each project relies on the work done by these volunteers, who can be: - elementary, middle school, or high school teachers, together with their classes; - pre-service teachers; - college students and/or professors; - retirees who like problem-solving and interacting with young children; - others who love math and are willing to share their experience with students. Mentors are needed for five Forum projects that will begin in September. To volunteer, first read about mentor responsibilities and then register online: Elementary Problem of the Week http://mathforum.org/elempow/1998_99mentors/ Middle School Problem of the Week http://mathforum.org/midpow/1998_99mentors/ Geometry Problem of the Week http://mathforum.org/geopow/1998_99mentors/ Algebra Problem of the Week http://mathforum.org/algpow/1998_99mentors/ Trigonometry and Calculus Problem of the Week http://mathforum.org/calcpow/1998_99mentors/ -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- MATH IN THE MOVIES - Arnold G. Reinhold http://world.std.com/~reinhold/mathmovies.html It's My Turn (1980) "In the opening scene of this romantic comedy, Jill Clayburgh, playing a mathematics professor, proves the 'snake lemma' of homological algebra..." Sneakers (1992) "...the film correctly points out that a breakthrough in factoring could happen and would be worth a lot to criminals and people who break codes." Die Hard: With A Vengeance (1995) "Bruce Willis and Samuel L. Jackson are given a five gallon jug and a three gallon jug, and must put exactly four gallons of water on a scale to keep a bomb from exploding. " ... and many more. A growing guide to motion pictures that include scenes with real mathematics. Each movie is linked to further information, mathematical scene(s) are described, and the math content is rated. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum http://mathforum.org/ Ask Dr. Math http://mathforum.org/dr.math/ Problems of the Week http://mathforum.org/pow/ Internet Resources http://mathforum.org/~steve/ Join the Math Forum http://mathforum.org/join.forum.html Send comments to the Math Forum Internet Newsletter editors _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \ |

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