12
Petr Viktorin
http://encukou.cz/
Last seen 9 years ago
Member for 11 years, 6 months, 7 days
Difficulty Normal
# Sum areas of the parallelograms (x1, 0)-(x1, y1)-(x2,y2)-(x2,0)
That should be "Trapezoid", not "parallelogram". Pardon my English...
More