CSS Ellipse Segment Math - Click in the gray area! Meta-Method to solve this seemingly hard problem: usage of a Coordinate System Sequence + basic math. The red ellipse in CS0 is a unit circle in CS5 :) width (100..300): height (100..300): CS0 (canvas) CS1 (blue border) CS2 (blue background) CS3 (green background) CS4 (green border) CS5 (red ellipse) eccentricity in CS4 (+): DIV (ellipse segment) linewidth (1..40): overflow:hidden clip-path:polygon polygon segments (2..12): | ||