This math topic focuses on calculating the area of simple shapes, specifically triangles, rectangles, and squares. The problems help students correctly associate a shape with its appropriate area formula. For example, for a triangle, the area calculation involves multiplying half the base by the height, for a rectangle it's length times width, and for a square, the area is found by squaring one side. This is an introductory level exercise, aimed at strengthening understanding of area formulas for these basic shapes.