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Result 121 to 140 of 490 total

From a hypothesis to a theorem. (Od hipotezy do twierdzenia.) (Polish. English summary)
Ann. Univ. Paedagog. Crac. 110, Stud. Didact. Math. Pertin. 4, 75-82 (2012).
Classification: E50 G60
121
If not, then what if as well? Unexpected trigonometric insights. (English)
Math. Enthus. 9, No. 1/2, 19-36 (2012).
Classification: G60
122
The special problem. (Die besondere Aufgabe.) (German)
Monoid 32, No. 110, 13-15 (2012).
Classification: U40 G60
123
A computational solution of question 6 from IMO 2011. (English)
Gaz. Mat., Ser. B 117, No. 1, 1-7 (2012).
Classification: G60 U40
124
An extension of Torricelli’s theorem. (O extindere a teoremei lui Torricelli.) (Romanian. English summary)
Gaz. Mat., Ser. B 117, No. 5, 228-231 (2012).
Classification: G60
125
The partition of the surface of a convex polygon into equivalent triangles. (Împărţirea unei suprafeţe poligonale convoxe în triunghiuri echivalente.) (Romanian. English summary)
Gaz. Mat., Ser. B 117, No. 6-8, 291-293 (2012).
Classification: G60 G40
126
A very useful Pythagorean tree. (English)
Silva, Jorge Nuno (ed.), Proceedings of the recreational mathematics colloquium II, University of Évora, Portugal, April 27‒30, 2011. Lisboa: Associação Ludus (ISBN 978-989-97346-2-3/pbk). 3-15 (2012).
Classification: G60 F30 A30
127
The isosceles trapezoid and its dissecting similar triangles. (English)
Forum Geom. 12, 29-38 (2012).
Classification: G60
128
More integer triangles with $R/r = N$. (English)
Forum Geom. 12, 27-28 (2012).
Classification: G60
129
Travelling in space and time: the mathematics of fortresses. (Voyager dans l’espace et dans le temps: les mathématiques des fortifications.) (French)
Losanges, No. 16, 3-8 (2012).
Classification: M80 G60
130
A generalization of the identity $\cos π/3 = 1/2$. (English)
Math. Mag. 85, No. 2, 124-125 (2012).
Classification: I30 G60
131
Semicircumference: the formulas of Heron and Brahmagupta. (Demi-périmètre, formules de Héron et Brahmagupta.) (French)
Losanges, No. 16, 59-62 (2012).
Classification: G60
132
Generalised trigonometry. (English)
Math. Spectr. 44, No. 3, 102-110 (2012).
Classification: G60
133
Trigonometry without right angles. (English)
Math. Spectr. 44, No. 3, 98-101 (2012).
Classification: G60
134
99 intersection points. Examples, pictures, proofs. (99 Schnittpunkte. Beispiele, Bilder, Beweise.) 2nd revised and expanded ed. (German)
EAGLE 10. EAGLE-Einblicke. Leipzig: Edition am Gutenbergplatz Leipzig (EAGLE) (ISBN 978-3-937219-95-0/pbk). 188~p. (2012).
Classification: G80 G60 Reviewer: Victor V. Pambuccian (Phoenix)
135
Yet five different ways of calculation of $\operatorname{tg}\frac{5π}{24}$. (Još pet raznih načina izračunavanja $\operatorname{tg}\frac{5π}{24}$.) (BS. English summary)
MAT-KOL (Banja Luka) 18, No. 2, 11-17 (2012).
Classification: G40 G60
136
Navigation on the earth. (Navigieren auf der Erde.) (German)
Monoid 31, No. 107, 32-34 (2011).
Classification: G60 M50
137
From sphere to plane. (Von der Kugel auf die Ebene.) (German)
Monoid 31, No. 107, 28-32 (2011).
Classification: G50 G60 M50 Reviewer: Peter Dürr (Linkenheim)
138
Improving an approximate formula. (English)
Math. Sch. (Leicester) 40, No. 3, 29 (2011).
Classification: G60 N50
139
The problem with square pegs and Pólya’s lesson on how to solve it. (English)
Math. Sch. (Leicester) 40, No. 3, 16-19 (2011).
Classification: G40 G60
140

Result 121 to 140 of 490 total

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