The orifice plate area of 0.0058 ft² corresponds to a diameter of 1.025 inches, which is confirmed through area calculations for a circle. The area is derived from the formula for the area of a circle, demonstrating that the values are equivalent. The discussion highlights the importance of double-checking calculations, especially when fatigue affects clarity. Acknowledgment of needing assistance with basic concepts is also noted. Understanding these fundamentals is crucial for accurately determining the orifice coefficient.