1. This document discusses different methods for counting line segments, triangles, squares, and quadrilaterals using formulas. 2. For line segments, the formula is n(n+1)/2, where n is the number of segments in a line. This is applied individually to each line and summed. 3. For triangles, the formula is n(n+1)/2 multiplied by the number of symmetrical bases. This is applied to each base and multiplied by the total number of bases. 4. For squares, the formula is n(n+1)/2(2n+1), where n is the number of squares in a line. This is applied individually to each line and summed