Parallel, Perpendicular, & Point-Slope Form

This example demonstrates the geometric relationships and algebraic expressions of parallel lines, perpendicular lines, and point-slope form equations. Key concepts include equal slopes for parallel lines, product of slopes being -1 for perpendicular lines, and the point-slope equation y-y1=m(x-x1). Construction uses commands like Random and FractionText, with interactive buttons (button1, button2, button3), objects (a, b, f, c, d), and text elements (text1-text10) to illustrate the concepts. Suitable for high school coordinate geometry teaching, helping students understand the geometric meaning and practical applications of linear equations.