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Working with representations ‒ developing workable concepts. (Mit Darstellungen arbeiten ‒ tragfähige Vorstellungen entwickeln.) (German)
PM Prax. Math. Sch. 52, No. 32, 1-8 (2010).
Classification: C30 E40
1
Pears instead of apples. (Birnen statt Äpfel.) (German)
Wurzel 43, No. 7, 146-149 (2009).
Classification: G40 G60 I60
2
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
3
The egg of Columbus: Geometric ideas ‒ (almost) without any numbers. (Das Ei des Kolumbus: Geometrische Ideen ‒ (fast) ohne Zahlen.) (German)
Unimag. Hann., No. 1-2, 50-54 (2008).
Classification: G30 A30
4
Do you know the solids? (Kennst du die Körper?) (German)
Sache Wort Zahl 35, No. 88, 46-54 (2007).
Classification: G22 D82 U62
5
Constructing with GAM. (Konstruieren mit GAM.) (German)
IBDG, Inf.bl. Geom. 25, No. 1, 32-34 (2006).
Classification: G80 U70 R20 R60
6
Building interactive analogies of plane geometry in the virtual space. (Interaktives Analogisieren ebener Geometrie im virtuellen Raum.) (German)
Mathematikunterricht 52, No. 6, 37-60 (2006).
Classification: G40 G50 C30 U70 R20
7
Applied mathematics. Unit 8. Working with shapes in three dimensions. Teacher’s guide. Angewandte Mathematik. Unterrichtseinheit 8. Arbeiten mit Flaechen im dreidimensionalen Raum. Lehrerband. (Center for Occupational Research and Development, Waco, TX (United States)). (English)
May 1992. 114 p. Available from Center for Occupational Research and Development, Waco, TX (United States). [ISBN 1-55502-308-8]
Classification: G43 G47
8
Geometry on a cylinder. Geometrie an einem Zylinder. (English)
Plus (Leicester). (Spr 1992) (no.20) p. 16-18. [ISSN 0268-2095]
Classification: G90
9
The optimum can design. Die optimale Dosenform. (German)
Math. Sch. (Dec 1991) v. 29(12) p. 841-844. CODEN: MKSCAS [ISSN 0465-3750]
Classification: I40 G30 D40
10
Square roots in geometric problems. Die Quadratwurzel bei geometrischen Problemen. (German)
Lehrer J. Hauptschulmag. (Jul-Aug 1990) v. 5(7/8) p. 43-46. [ISSN 0930-6951]
Classification: G33 D83
11
Liquid measurements - a mathematical appraisal. Messungen von Fluessigkeiten - eine mathematische Bewertung. (English)
Aust. Math. Teach. (Jul 1990) v. 46(2) p. 10-11. [ISSN 0045-0685]
Classification: G34
12
Geometry from Paper Towel Containers. Geometrie der Papierbehaelter. (English)
AMATYC Rev. (Aut 1990) v. 12(1) p. 15-20.
Classification: G34
13
Requirements in students’ achievement in solid geometry. An empirical study. Anforderungen und Schuelerleistungen in der Stereometrie. Eine empirische Erhebung. (German)
J. Math.-Didakt. (1990) v. 11(2) p. 89-110. [ISSN 0173-5322]
Classification: G43 G33 D63
14
An ant on a can. Muravej na konsernoj banke. Die Ameise auf der Konservendose. (Russian)
Kvant. (1989) (no.9) p. 27-29.
Classification: I44 G44
15
On treating the Cavalieri principle in the lower secondary school level. Zur Behandlung des Cavalieri-Prinzips in der Sekundarstufe 1. (German)
PM, Prax. Math. (15 Apr 1989) v. 31(3) p. 129-143. CODEN: PRMAA6 [ISSN 0032-7042]
Classification: G33 I53 D33
16
Computer graphics 1. Software for geometry in Turbo PASCAL 4.0. Computergrafik 1. Eine Software zur Geometrie in Turbo-PASCAL. (German)
Biebertal-Vetzberg: Wuerfel-Verlag. 1989. 448 p. [ISBN 3-923210-95-7]
Classification: R60 P40
17
Treatment of cylinders in the computing classroom. Die Behandlung der Rundsaeule. Eine Aufgabe der informationstechnischen Grundbildung. (German)
Ehrenwirth Hauptschulmag. (Jul-Aug 1989) v. 4(7/8) p. 69-71. [ISSN 0340-580X]
Classification: G33 R23
18
Satisfying one’s client - volumes of some depth reconsidered. Einen Kunden zufriedenstellen - die Betrachtung von Volumina. (English)
Teach. Math. Appl. (1988) v. 7(4) p. 188-190. [ISSN 0268-3679]
Classification: G35 M55
19
The conder tankit. Der Condertank. (English)
Teach. Math. Appl. (1988) v. 7(4) p. 186-187. [ISSN 0268-3679]
Classification: G35 M55
20
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