This math topic focuses on using the Cartesian grid to solve problems related to locating coordinates and calculating dimensions of rectangles given their perimeters. It specifically deals with finding the height or width of rectangles when certain perimeter values are provided. All the perimeter values used in these problems are positive, ensuring that the calculations and concepts are straightforward and accessible. This introductory level geometry topic is essential for developing understanding in coordinate manipulation and basic geometry principles within the Cartesian system.