Math Forum Internet News

Volume 4, Number 9

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1 March 1999                                    Vol. 4, No. 9


1999 NCTM Meetings | Formula FAQs: Polar/Spherical/Cylindrical |
MathSearch 1999 NCTM MEETINGS San Francisco, California The 77th annual meeting of the National Council of Teachers of Mathematics (NCTM) will offer more than 1200 sessions spanning three days, April 22-24, 1999. Technology sessions in computer labs will feature 24 workshops and 6 minicourses. In addition, an open lab will be available for browsing, software previewing, and e-mail checking. The NCTM Electronic Resources Committee (ERC) will present two half-day minicourses focusing on new resources for the K-8 classroom and the 9-12 classroom: Major technology speakers and highlights include: - Alan Kay, Disney Imagineering - Susan Schilling, Lucas Learning - Tom Snyder, Tom Snyder Software - CWaC, the Math Forum's "Conference Within a Conference" - Web developers Suzanne Alejandre and Cynthia Lanius Session information is available onsite: -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- MORE ANALYTIC GEOMETRY FORMULAS FROM THE DR. MATH FAQ Robert L. "Dr. Rob" Ward has added three more new units to the analytic geometry formula FAQ: 1. POLAR COORDINATES covers coordinates, points, directions, translations, rotations, lines, triangles, and conic sections (hyperbolas, parabolas, ellipses, circles). 2. SPHERICAL COORDINATES are obtained by using polar coordinates in a plane, adding a vertical axis perpendicular to the plane passing through the pole, and assigning a positive direction to it. 3. CYLINDRICAL COORDINATES are obtained by using polar coordinates in a plane, and then adding a z-axis perpendicular to the plane passing through the pole. -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- MATHSEARCH - Jim Richardson School of Mathematics and Statistics University of Sydney, Australia MathSearch provides access to more than 90,000 searchable English-language documents on mathematics and statistics servers across the Web, primarily at the university and research levels. The search engine accepts up to four phrases, and reports back: - how many sentences in the document contain each phrase - the document title if it exists (otherwise the URL is given) - the WWW server containing the document (if not already given in the URL) - the number of sentences in the document - the total number of stems, other than the ones ignored, in the document A partial description of how the index information was collected is provided: -|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|-\-/-|- CHECK OUT OUR WEB SITE: The Math Forum Ask Dr. Math Problems of the Week Internet Resources Teacher2Teacher Discussion Groups Join the Math Forum Send comments to the Math Forum Internet Newsletter editors _o \o_ __| \ / |__ o _ o/ \o/ __|- __/ \__/o \o | o/ o/__/ /\ /| | \ \ / \ / \ /o\ / \ / \ / | / \ / \

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