ID NAME QUALITY USERS ACC % DIFFICULTY C I
26445 Alicias Afternoon Amble   9 175
19
26
780 The Archipelago   22
45
34
397 I Conduit   3 187
28
28
35 Equipment Box   4 937
9
17
34481 Galactic Division   2 8
12205 Minimum Bounding Rectangle   3 1157
8
4
15709 Two Circles   6 1233
3
3
40 Lifting the Stone   6 1344
14
17

#plane-geometry

The problem involves Cartesian plane geometry

https://en.wikipedia.org/wiki/Plane_(geometry) http://www.mathopenref.com/planegeometry.html