[AC] 1031 Fence
[AC] 1039 Pipe
[AC] 1092 Farmland
[AC] 1106 Transmitters
[AC] 1113 Wall
[AC] 1118 Lining Up
[AC] 1133 Stars
[AC] 1151 Atlantis
1225 STRICTLY INSCRIBED SIMILAR TRIANGLES
[AC] 1259 The Picnic
[AC] 1263 Reflections
[AC] 1265 Area
[AC] 1266 Cover an Arc.
[AC] 1269 Intersecting Lines
[AC] 1271 Nice Milk
[AC] 1279 Art Gallery
[AC] 1294 Not Too Convex Hull
[AC] 1319 Pipe Fitters
1347 Triangle
1361 JaWs
[AC] 1375 Intervals
[AC] 1379 Run Away
[AC] 1389 Area of Simple Polygons
[AC] 1408 Fishnet
[AC] 1410 Intersection
[AC] 1418 Viva Confetti
1428 Hermes’ Colony
[AC] 1434 Fill the Cisterns!
[AC] 1444 Parallelepiped walk
[AC] 1471 Triangles
[AC] 1473 There’s Treasure Everywhere!
[AC] 1494 Sunrise
1499 Supercomputer Selection, The Sequel
1500 Polygonal Puzzle
1514 Metal Cutting
1518 Problem Bee
1536 Trains
[AC] 1556 The Doors
[AC] 1569 Myacm Triangles
[AC] 1584 A Round Peg in a Ground Hole
[AC] 1586 Three Sides Make a Triangle
1605 Horse Shoe Scoring
1610 Quad Trees
1623 Squadtrees
[AC] 1624 This Takes the Cake
1645 BSP Trees
[AC] 1654 Area
1660 Princess FroG
[AC] 1673 EXOCENTER OF A TRIANGLE
1685 Color Tunnels
[AC] 1687 Buggy Sat
1688 Dolphin Pool
1693 Counting Rectangles
[AC] 1696 Space Ant
1727 Advanced Causal Measurements (ACM)
1758 Frontier
1765 November Rain
1774 Fold Paper Strips
1803 Box Art
1810 Covering
1813 Overlapped Shapes
1819 Disks
1834 线段处理
1843 Shire
1851 Map
1871 Bullet Hole
[AC] 1873 The Fortified Forest
1875 Robot
1877 Flooded!
1881 Sail Race
1899 Farmer Bill’s Problem
1902 Illumination
1912 A highway and the seven dwarfs
1921 Paper Cut
1927 Area in Triangle
1931 Biometrics
1937 Balanced Food
1939 Diplomatic License
1940 Polygon Programming with Ease
1956 Pumps and Pipes
1971 Parallelogram Counting
1981 Circle and Points
1982 Water Tank
2007 Scrambled Polygon
2012 Triangle Cuts
2016 Ink Blots
2026 As the Crow Flies
2031 Building a Space Station
2036 I Conduit!
2043 Area of Polygons
2048 Monster Trap
2053 Square
2066 Minimax Triangulation
2069 Super Star
2074 Line of Sight
[AC] 2079 Triangle
2087 Petanque
2098 Ellipse
2130 Jogging
2149 Inherit the Spheres
2150 Crossing Prisms
2164 Find the Border
2165 Gunman
2172 Bricks
2177 Ghost Busters
[AC] 2284 That Nice Euler Circuit
2621 Parallelepiped
2622 Convex hull
2686 Traveling by Stagecoach
2687 Earth Observation with a Mobile Robot Team
2747 Shy Polygons
2839 Convex Hull and Triangle
2932 Coneology
[AC] 2954 Triangle
3011 Secrets in Shadows
[AC] 3129 How I Wonder What You Are!
[AC] 3130 How I Mathematician Wonder What You Are!
3135 Polygons on the Grid
[AC] 3151 Driving Directions
[AC] 3327 Cut the Cake
[AC] 3329 Twirl Around
[AC] 3334 Connected Gheeves
[AC] 3335 Rotating Scoreboard
[AC] 3336 ACM Underground
[AC] 3347 Kadj Squares
[AC] 3384 Feng Shui
[AC] 3407 Brookebond s’en va en guerre…
[AC] 3410 Split convex polygon
[AC] 3502 Flight Safety
3521 Geometric Map
[AC] 3525 Most Distant Point from the Sea
[AC] 3608 Bridge Across Islands
[AC] 3675 Telescope