Skip to main content
Log in

Heron triangles with figurate number sides

  • Published:
Acta Mathematica Hungarica Aims and scope Submit manuscript

Abstract

By the theory of Pellian equation and the method of undetermined coefficients, we show that there exist infinitely many isosceles Heron triangles whose sides are polygonal numbers and binomial coefficients.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. Bailey, H., Gosnell, W.: Heronian triangles with sides in arithmetic progression: an inradius perspective. Math. Mag. 85, 290–294 (2012)

    Article  MathSciNet  MATH  Google Scholar 

  2. Ballew, D.W., Weger, R.C.: Pythagorean triples and triangular numbers. Fibonacci Quart. 17, 168–172 (1979)

    MathSciNet  MATH  Google Scholar 

  3. E. Deza and M. M. Deza, Figurate Numbers, World Scientific Publishing Co. Pte. Ltd. (Singapore, 2012)

  4. Fleeor, C.R.: Heronian triangles with consecutive integer sides. J. Rec. Math. 28, 113–115 (1996)

    Google Scholar 

  5. R. K. Guy, Unsolved Problems in Number Theory, Springer-Verlag (Berlin, 2004)

  6. H. Harborth and A. Kemnitz, Fibonacci triangles, in: Applications of Fibonacci Numbers, Vol. 3 (1988), Kluwer Acad. Publ. (Dordrecht, 1990), pp. 129–132

  7. Harborth, H., Kemnitz, A., Robbins, N.: Non-Existence of Fibonacci triangles. Congr. Numer. 114, 29–31 (1996)

    MathSciNet  MATH  Google Scholar 

  8. B. He, A. Togbé and M. Ulas, On the Diophantine equation \(z^2=f(x)^2\pm f(y)^2\). II, Bull. Aust. Math. Soc., 82 (2010), 187–204

  9. M. Lagneau, Integer areas of integer-sided triangles where two sides are of square length, http://oeis.org/A232461 (2013)

  10. Luca, F.: Fermat primes and Heron triangles with prime power sides. Amer. Math. Monthly 110, 46–49 (2003)

    Article  MathSciNet  MATH  Google Scholar 

  11. MacDougall, J.A.: Heron triangles with sides in arithmetic progression. J. Rec. Math. 31, 189–196 (2003)

    Google Scholar 

  12. L. Rathbun, Second primitive Heron triangle with square sides found, listserv.nodak.edu/cgi-bin/wa.exe?A2=ind1804&L=NMBRTHRY&P=705 (2018)

  13. Sastry, K.R.S.: A Heron difference. Crux Math. 27, 22–26 (2001)

    Google Scholar 

  14. Sierpiński, W.: Sur les nombres triangulaires carrés. Bull. Soc. Royale Sciences Liége 30, 189–194 (1961)

    MathSciNet  MATH  Google Scholar 

  15. W. Sierpiński, Elementary Theory of Numbers, Wroclawska Drukarnia Naukowa (Warzawa, 1964)

  16. P. Stănică, S. Sarkar, S. S. Gupta, S. Maitra and N. Kar, Counting Heron triangles with constraints, Integers, 13 (2013), #A3

  17. Sz. Tengely and M. Ulas, On certain Diophantine equation of the form \(z^2=f(x)^2\pm g(y)^2\), J. Number Theory, 174 (2017), 239–257

  18. Ulas, M., Togbé, A.: On the Diophantine equation \(z^2=f(x)^2\pm f(y)^2\). Publ. Math. Debrecen 76, 183–201 (2010)

    MathSciNet  MATH  Google Scholar 

  19. Y. Zhang and A. Zargar, On the Diophantine equations \(z^2=f(x)^2\pm f(y)^2\) involving quartic polynomials, Period. Math. Hung. (2018), https://doi.org/10.1007/s10998-018-0259-7

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Y. Zhang.

Additional information

This research was supported by the National Natural Science Foundation of China (Grant No. 11501052).

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Peng, J., Zhang, Y. Heron triangles with figurate number sides. Acta Math. Hungar. 157, 478–488 (2019). https://doi.org/10.1007/s10474-018-00907-0

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10474-018-00907-0

Key words and phrases

Mathematics Subject Classification

Navigation