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The element equation for a chord approximating an arc is $2r\sin\left(\frac{\theta}{2}\right)$. This formula calculates the length of one straight finite element used to approximate a circular arc segment, derived from basic trigonometry using the radius and the half central angle.

Conditions: The element is modeled as a straight chord of a circle.; $r$ is the circle radius.; $\theta$ is the central angle subtended by the element.

The element equation for a chord approximating an arc is $2r\sin\left(\frac{\theta}{2}\right)$. This formula calculates the length of one straight finite element used to approximate a circular arc segment, derived from basic trigonometry using the radius and the half central angle.

Conditions: The element is modeled as a straight chord of a circle.; $r$ is the circle radius.; $\theta$ is the central angle subtended by the element.