Equation of Circle LARGE TEXT

① This example demonstrates the equation of a circle with large, readable text, visually linking the algebraic form to the geometric circle on a coordinate plane. ② Core mathematical concepts include the standard equation of a circle (center-radius form), coordinates of the center, radius length, and the relationship between a point and the circle. ③ Construction details: The GeoGebra Circle command is used, involving objects such as center k, radius h, point A on the circle, circle c, and a large text object text1 displaying the equation; users can dynamically adjust the center and radius to see how the equation changes. ④ Suitable for middle school to high school students learning analytic geometry, and useful for teachers in classroom demonstrations or for self-directed exploration, emphasizing the correspondence between algebraic equations and geometric figures.