Drawing the sine curve: the length of a half chord

This example demonstrates how to draw the sine curve and calculate the length of a half chord. Key math concepts include the sine function, linear regression, equilateral triangles, and geometric construction. The construction uses GeoGebra commands like Segment, Rotate, and Angle, along with objects such as c, f, α, A, B, C, g, D, h, E, E', β, button1, p, text1, P. Suitable for high school mathematics education to understand the geometric properties and construction methods of the sine function graph.