What do equal rectangle diagonals help prove? They help show the rectangle is square within the chosen tolerance. topicladder math math Why mark clearance before cutting? The part can be mathematically correct but still collide with fasteners, wires, tools, or movement. topicladder math math What does the 'Mark the fixed references' step prove? A layout needs one edge, hole, or corner that everything else references. Check: The drawing shows which feature is fixed. topicladder math math What does the 'Check square with diagonals' step prove? Equal diagonals can prove a rectangle is square enough for many builds. Check: The two diagonal measurements are close within the chosen tolerance. topicladder math math What does the 'Add clearance zones' step prove? A part that fits on paper can still collide with fasteners, wires, or movement. Check: The sketch marks the areas that must stay empty. topicladder math math What does the 'Measure before cutting' step prove? Permanent work should wait until the layout has a check. Check: The note lists the final check before cutting, drilling, or printing. topicladder math math When would you use `diagonal = sqrt(width^2 + height^2)`? Use it to estimate a rectangle diagonal. Expected signal: The expected diagonal for a square-check comparison topicladder math command When would you use `clearance = opening - part_size`? Use it to check fit before cutting or printing. Expected signal: A positive clearance value with units topicladder math command When would you use `center = length / 2`? Use it to find the centerline of a part. Expected signal: A reference point for symmetric layout topicladder math command Where can you review the full Geometry for Cuts, Clearance, and Fit context? Use the TopicLadder page for the text lesson, examples, downloads, and practice task: https://topicladder.com/learn/geometry-for-cuts-clearance-and-fit/ topicladder math math source