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Result 1 to 20 of 30 total

Proof without words: sums of triangular numbers. (English)
Math. Mag. 88, No. 3, 177-178 (2015).
Classification: K20
1
Proof without words: sums of products of three consecutive integers. (English)
Math. Mag. 88, No. 1, 37-38 (2015).
Classification: K20 H20
2
Sum of products of two consecutive integers: proof without words. (English)
Math. Comput. Educ. 49, No. 1, 25-27 (2015).
Classification: I30 E50
3
Proof without words: an arctangent identity. (English)
Coll. Math. J. 45, No. 5, 357 (2014).
Classification: G65
4
Proof without words: a formula of Hermann. (English)
Coll. Math. J. 45, No. 5, 387 (2014).
Classification: G60
5
Proof without words: the difference of consecutive integer cubes is congruent to 1 modulo 6. (English)
Coll. Math. J. 45, No. 2, 135 (2014).
Classification: F60
6
Preservice primary school teachers’ performance on rotation of points and shapes. (English)
Smith, C. (ed.), Proceedings of the British Society for Research into Learning Mathematics (BSRLM). Vol. 32, No. 3. Proceedings of the day conference, University of Cambridge, UK, June 17, 2012. London: British Society for Research into Learning Mathematics (BSRLM). 185-190 (2012).
Classification: C39 C29 G59 D69 D79
7
Picturing Newton’s formula for $π$. (English)
Math. Sch. (Leicester) 41, No. 5, 13 (2012).
Classification: G40 G60 A30
8
Proof without words: runs of triangular numbers. (English)
Math. Mag. 85, No. 5, 373 (2012).
Classification: F65 I35
9
Proof without words: an arctangent equality. (English)
Math. Comput. Educ. 45, No. 3, 197 (2011).
Classification: G60 E50
10
Proof without words: $T_{T_n}$. (English)
Math. Comput. Educ. 45, No. 1, 72 (2011).
Classification: E50 H20
11
Ratios of odd and even triangular numbers. (English)
Math. Sch. (Leicester) 39, No. 5, 36 (2010).
Classification: F60 H20
12
Visualization in modular arithmetic: dividing by 4. (English)
Math. Sch. (Leicester) 39, No. 4, 29 (2010).
Classification: E50 F60 H20
13
Proof without words: sums of octagonal numbers. (English)
Math. Mag. 83, No. 1, 58 (2010).
Classification: F60 E50
14
A visual proof for the sum of the first $n$ triangular numbers. (English)
Math. Intell. 32, No. 1, 6-7 (2010).
Classification: K20 F60
15
Summing series by building a staircase. (English)
Math. Sch. (Leicester) 39, No. 1, 36-37 (2010).
Classification: I30 H20
16
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
17
Proof without words: every octagonal number is the difference of two squares. (English)
Math. Mag. 82, No. 3, 225 (2009).
Classification: F60
18
Proof without words: $\sin^2(α+β)=\sin^2α+\sinβ\cosβ$. (English)
Math. Comput. Educ. 43, No. 2, 118-120 (2009).
Classification: E50 G60
19
To graph or not to graph: The use of diagrams in problem solving. (English)
Math. Sch. (Leicester) 38, No. 5, 17-20 (2009).
Classification: M50 D50 H30 G40
20
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