给寻访红色足迹定向赛的照片，取个名字
Geometry Problem Solving

Grades 79
Modify Image: Replace '21KM+700' with '27KM400'
Minimize Red Boxes in Stacking Problem: 12r = 25g
Counting Triangles in a Picture: How Many Triangles Are There?
Coordinate Geometry Problem: Line Intersections and Geometric Transformations
Solving Logic Puzzle: Correctly Labeling Golf Ball Bags