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Does the camera map parabolas onto parabolas? (Bildet der Fotoapparat Parabeln auf Parabeln ab?) (German)
Mathematikunterricht 57, No. 4, 56-61 (2011).
Classification: M90 G70 G90
1
Ideas for proofs in geometry. (Beweisideen in der Geometrie.) (German)
Mathematikinformation, No. 55, 24-41 (2011).
2
Problems for a training camp on the Mathematical Olmpiad. (Aufgaben für ein Trainigscamp zur Mathematik-Olympiade.) (German)
Mathematikinformation, No. 54, 15-25 (2011).
Classification: U40 C90 G90
3
Applications in Archimedes Geo3D. (Anwendungen in Archimedes Geo3D.) (German)
IBDG, Inf.bl. Geom. 29, No. 1, 10-14 (2010).
Classification: U70 G40 I80 R20
4
Another approach to conic sections. (Ein anderer Zugang zu den Kegelschnitten.) (German)
Wurzel 44, No. 8, 176-183 (2010).
Classification: G70
5
On the trace of the ellipse. Elementary and experimental approaches from grade 4 up. (Auf der Spur der Ellipse. Elementare und experimentelle Zugänge ab Klasse 4.) (German)
PM Prax. Math. Sch. 51, No. 29, 35-40 (2009).
Classification: U62 U63 G42 G43 G72 G73 D42 D43
6
Making the curriculum of Analytic Geometry more attractive: ‒ Parametric representations, parts of planes ‒. (Das Analytische Geometrie-Curriculum attraktiver machen: ‒ Parameterdarstellungen, Ebenenteile ‒.) (German)
Mathematikunterricht 55, No. 3, 32-52 (2009).
Classification: G70 U70 R20 M80
7
Conic sections are sections of cones: A plea for the revival of an interesting topic. (Kegelschnitte sind Kegel-Schnitte: Plädoyer für die Renaissance eines interessanten Themas.) (German)
Mathematikunterricht 55, No. 3, 16-30 (2009).
Classification: G70 U70 R20
8
An elementary proof for the falling apart of the intersection line of two cones of revolution that are tangent to a common sphere. (Ein elementarer Beweis für den Zerfall der Durchdringungskurve zweier Drehkegel, die eine gemeinsame Kugel berühren.) (German)
IBDG, Inf.bl. Geom. 26, No. 2, 12-13 (2008).
Classification: G40 G80
9
Strange questions by students. (Verquere Schülerfragen.) (German)
Mathematikinformation, No. 49, 24-37 (2008).
Classification: D50 M50 U70 G70 R20
10
Constructions in virtual space. (Konstruieren im virtuellen Raum.) (German)
Mathematikunterricht 54, No. 5, 53-56 (2008).
Classification: G40 U70 R20
11
Descriptive geometry at the faculty of architecture in Karlsruhe: Teaching ‒ pedagogical-didactical experiments ‒ research approaches. (Darstellende Geometrie an der Architekturfakultät Karlsruhe: Lehre ‒ pädagogisch-didaktische Experimente ‒ Forschungsansätze.) (German)
IBDG, Inf.bl. Geom. 25, No. 1, 10-25 (2006).
Classification: G85 B40 D35 U75 R25 A35
12
Plane geometry. Ebene Geometrie. (German)
Berlin: Springer. 1993. 212 p. With 79 figs. Ser. Title: Springer-Lehrbuch. [ISBN 3-540-56326-1]
Classification: G45 G55 G75
13
Elements of geometry. Elemente der Geometrie. (German)
ZDM, Zentralbl. Didakt. Math. (Apr 1993) v. 25(2) p. 63-64. Book review: Scheid, H.: Elmente der Geometrie, Mannheim: BI, 1991, 498 p., ISBN 3-411-14931-0. [ISSN 0044-4103]
Classification: G19 G10
14
Astronomy in mathematics education - orientation towards the subject. Astronomie im Mathematikunterricht - Orientierung an der Sache. (German)
Mathematikunterricht. (Mar 1993) v. 39(2) p. 5-17. [ISSN 0025-5807]
Classification: M50
15
Teaching unit on conic sections. Pt. 2. Kegelschnitte - ein Lehrgang. T. 2. (German)
Math. Sch. (Feb 1993) v. 31(2) p. 112-117. CODEN: MKSCAS [ISSN 0465-3750]
Classification: G70
16
A course in conic sections. Pt. 1. Kegelschnitte - ein Lehrgang. T. 1. (German)
Math. Sch. (Jan 1993) v. 31(1) p. 18-28. CODEN: MKSCAS [ISSN 0465-3750]
Classification: G74
17
Workbook Cabri Geometre. Using the computer for geometric constructions. Arbeitsbuch Cabri Geometre. Konstruieren mit dem Computer. (German)
Bonn: Duemmler. 1993. 167 p. With many figs., technical tips and didactical-methodical explanations. Ser. Title: Computer-Praxis Mathematik. [ISBN 3-427-45741-9]
Classification: G10 N83 U70
18
Applied mathematics. Unit 25. Quadratics. Teacher’s guide. Angewandte Mathematik. Unterrichtseinheit 25. Quadratische Gleichungen. Lehrerband. (Center for Occupational Research and Development, Waco, TX (United States)). (English)
May 1992. vp. Available from Center for Occupational Research and Development, Waco, TX (United States). [ISBN 1-55502-433-5]
Classification: H39 N39
19
Recent calculations of Pi: the Gauss-Salamin algorithm. Neueste Berechnungen von Pi: der Algorithmus von Gauss-Salamin. (English)
Math. Gaz. (1992) v. 76(476) p. 231-242. CODEN: MAGAAS [ISSN 0025-5572]
Classification: F50 F60
20
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