Mathematical and Physical Journal
for High Schools
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Problem B. 4648. (September 2014)

B. 4648. The faces of a tetrahedron are congruent triangles with sides of lengths 13, \(\displaystyle \textstyle \sqrt{281}\) and \(\displaystyle 20\) units. Determine the dihedral angle enclosed by two faces.

(5 pont)

Deadline expired on October 10, 2014.


Statistics:

83 students sent a solution.
5 points:Andó Angelika, Cseh Kristóf, Fekete Panna, Kerekes Anna, Kosztolányi Kata, Kovács Balázs Marcell, Polgár Márton, Schefler Barna, Schrettner Bálint, Schwarcz Tamás, Tihanyi Áron, Vághy Mihály, Williams Kada.
4 points:Andi Gabriel Brojbeanu, Bálint Gergely , Bereczki Zoltán, Coulibaly Patrik, Csatári Jakab, Csépai András, Czirkos Angéla, Döbröntei Dávid Bence, Gál Boglárka, Hansel Soma, Heinc Emília, Kátay Tamás, Khayouti Sára, Kovács Péter Tamás, Lajkó Kálmán, Molnár-Sáska Zoltán, Porupsánszki István, Regős Krisztina, Sándor Gergely, Szabó 524 Tímea, Széles Katalin, Telek Máté László, Varga Rudolf, Zsakó Ágnes.
3 points:17 students.
2 points:9 students.
1 point:18 students.
0 point:2 students.

Problems in Mathematics of KöMaL, September 2014