Circle Tangent to a Line - Geometry Diagram with Radius and Secant #208100 (License: Personal Use)

This diagram illustrates a fundamental Euclidean geometry concept: a circle tangent to a straight line at point T, where OT is the radius perpendicular to the tangent line AB. The dashed line OS represents a secant from external point S on AB to the circle’s center O, intersecting the circumference at S. Key points A, M, T, and B lie along the baseline, with M between A and T.

Used in mathematics education resources, geometry textbooks, or online tutorials explaining tangents, radii, and secant properties; targets students and educators seeking visual reinforcement of circle-line relationships.