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Result 201 to 220 of 490 total

Make 1 out of 2. (Aus 2 mach 1.) (German)
Wurzel 44, No. 5, 99-105 (2010).
Classification: G60 I30 I20
201
Proof without words: The cosine of difference. (English)
Math. Comput. Educ. 44, No. 2, Special Index Issue: Topic Index: 1990-2009, 115 (2010).
Classification: G60 E50
202
Bread and $\dots $ trigonometry. (Pan e $\dots $ trigonometria.) (Italian)
Boll. Docenti Mat., No. 60, 107-109 (2010).
Classification: G60 E50
203
Billiard quadrangles of a cyclic quadrangle. (Billard-Vierecke eines Sehnenvierecks.) (German)
MNU, Math. Naturwiss. Unterr. 63, No. 5, 267-269 (2010).
Classification: G40 G90 G60
204
A study on the length of trisectors in triangles. (Korean. English summary)
East Asian Math. J. 26, No. 2, 141-150 (2010).
Classification: G60
205
A study about how to use manipulative materials in school to teach the concept of angles. (Korean. English summary)
East Asian Math. J. 26, No. 2, 115-140 (2010).
Classification: G40 G60 U60
206
Plea for oriented angles. (Ein Plädoyer für den orientierten Winkel.) (German)
MNU, Math. Naturwiss. Unterr. 63, No. 2, 77-79 (2010).
Classification: G70 G60 D80
207
The theorem of 0.7 or the other Pythagorean theorem. (El teorema del 0,7 o el otro teorema de Pitágoras.) (Spanish)
Epsilon (Puerto Real) 26, No. 72, Special Issue, 71-77 (2009).
Classification: G60
208
Medieval source trigonometric values. (Středověký zrod trigonometrických veličin.) (Czech)
Učitel Mat. 17, No. 3, 143-157 (2009).
Classification: G60 A30
209
A method based on the similarity of triangles. (Metoda podobnosti trojúhelníků.) (Czech)
Mat. Fyz. Inform. 19, No. 4, 203-208 (2009).
Classification: G60
210
Circulation path of the gravity centres of variable triangles and quadrilaterales. I. (Oběžné dráhy těžiště proměnných trojúhelníků a čtyřúhelníků. I.) (Czech)
Mat. Fyz. Inform. 19, No. 4, 193-201 (2009).
Classification: G60
211
Trigonometry in Europe in the 15th‒17th century. (Trigonometrie v Evropě v 15. ‒ 17. století.) (Czech)
Učitel Mat. 17, No. 4, 201-212 (2009).
Classification: A30 G60
212
On the history of trigonometric functions and Ptolemy’s calculations. (Z historie goniometrických funkcí Ptolemaiovy výpočty.) (Czech)
Učitel Mat. 17, No. 2, 66-80 (2009).
Classification: A30 G60
213
Elements of modernization in the teaching of angles. (Modernizačné prvky v učive o uhloch.) (Slovak. English summary)
Žilková, Katarína (ed.), Potenciál prostredia IKT v školskej matematike. I. Bratislava: Univerzita Komenského v Bratislave (ISBN 978-80-223-2754-1). 89-96 (2009).
Classification: D30 G60
214
Disentangling a triangle. (English)
Am. Math. Mon. 116, No. 3, 228-237 (2009).
Classification: G40 G60
215
Geometrical lemmas of Thābit Ibn Qurra. (Lemmes géométriques de Thābit Ibn Qurra.) (French)
Rashed, Roshdi (ed.), Thābit ibn Qurra. Science and philosophy in ninth-century Baghdad. Papers from the international conference marking the eleven hundredth anniversary of the death of Thābit ibn Qurra, London, UK, November 2‒3, 2001. Berlin: Walter de Gruyter (ISBN 978-3-11-022078-0/hbk). Scientia Graeco-Arabica 4, 211-253 (2009).
Classification: A30 G60 Reviewer: Mowaffaq Hajja (Irbid)
216
Janet’s Pi-filling hypotheses (Archimedes’ method revisited). (English)
Math. Teach. (Reston) 103, No. 1, 81-85 (2009).
Classification: G30 G60 U70 N50 R20
217
Proof without words: $\sin^2(α+β)=\sin^2α+\sinβ\cosβ$. (English)
Math. Comput. Educ. 43, No. 2, 118-120 (2009).
Classification: E50 G60
218
Ellipse or parabola? (Ellisse o parabola?) (Italian. English summary)
Archimede 61, No. 2, 68-74 (2009).
Classification: G70 G40 G60
219
Three trigonometric results from a regular pentagon. (English)
Math. Sch. (Leicester) 38, No. 1, 33-34 (2009).
Classification: G60 G40
220

Result 201 to 220 of 490 total

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