The Shape of an Ellipse

Autor/in	Foley, Gregory D.
Titel	The Shape of an Ellipse
Quelle	In: Mathematics Teacher, 105 (2011) 4, S.274-279 (6 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0025-5769
Schlagwörter	Geometric Concepts; Mathematics Instruction; Geometry; National Standards; Correlation; Astronomy; Comprehension; Equations (Mathematics); Vocabulary; Mathematics Achievement; Class Activities; College Students; High School Students + Suchen Sie Ihr Suchwort? Elementare Geometrie; Mathematics lessons; Mathematikunterricht; Geometrie; Korrelation; Astronomie; Verstehen; Verständnis; Equations; Mathematics; Gleichungslehre; Wortschatz; Mathmatics sikills; Mathmatics achievement; Mathematical ability; Mathematische Kompetenz; Collegestudent; High school; High schools; Student; Students; Oberschule; Schüler; Schülerin; Studentin
Abstract	Ellipses vary in shape from circular to nearly parabolic. An ellipse's eccentricity indicates the location of its foci, but its aspect ratio is a direct measure of its shape. This article takes a careful look at the shape of an ellipse and offers practical suggestions and specific activities to deepen students' understanding of the geometry of an ellipse. Using the Common Core (2010) practices and NCTM (2000, 2009) Standards, the activities link an ellipse's shape to algebra, data, and measurement and make connections between mathematics and astronomy. (Contains 8 figures and 1 table.) (ERIC).
Anmerkungen	National Council of Teachers of Mathematics. 1906 Association Drive, Reston, VA 20191-1502. Tel: 800-235-7566; Tel: 703-620-3702; Fax: 703-476-2970; e-mail: orders@nctm.org; Web site: http://www.nctm.org/publications/
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10