Mathematical and Physical Journal
for High Schools
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Problem C. 1303. (September 2015)

C. 1303. The area of a rectangular origami sheet is \(\displaystyle 130~\rm{cm}^2\). The sheet is folded symmetrically by forming a regular triangle with two adjacent vertices turned inwards, as shown in the figure. Find the lengths of the sides of the original sheet.

(5 pont)

Deadline expired on October 12, 2015.


338 students sent a solution.
5 points:259 students.
4 points:53 students.
3 points:12 students.
2 points:4 students.
1 point:2 students.
0 point:3 students.
Unfair, not evaluated:5 solutionss.

Problems in Mathematics of KöMaL, September 2015