Arcs and Chevrons is a custom D3.js visualization that creates arc-shaped segments with pointed "chevron" tails at their starting angles, rendered as SVG. Using the d3-shape library, the example extends the standard arc generator to produce curved, tapered sectors with angled corners. The data is a simple hardcoded array of two arc objects, each specifying a start angle, end angle, and implicitly an inner/outer radius, which are drawn into a 500x500 SVG canvas. The custom chevronArc function computes the geometry for each arc, including corner tangents and tail coordinates, to generate the distinctive chevron-shaped ends. This demonstrates how D3's modular shape utilities can be adapted to create novel, non-standard geometric forms.