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