Regular Pentagon Construction in a Circle - Geometry Diagram #2258202 (License: Personal Use)

This black-and-white geometric illustration demonstrates the construction of a regular pentagon inscribed in a circle. The circle has center O and diameter FA measuring 1.5 inches; five radii (OA through OE) divide the circle into five congruent 36° central angles, with points A-E on the circumference forming the pentagon vertices. Dashed arcs and angle markers emphasize the equal angular spacing required for regularity.

Used in mathematics education resources, geometry textbooks, or online tutorials explaining polygon construction, circle theorems, or trigonometric relationships in regular polygons. Matches user intent for visual learning, homework help, or curriculum-aligned diagrams.