2024年6月北美A卷 · 第 17 题

2024年6月北美A卷 · 原库模块 2 · Q17 原库参考解析

In the given figure, \( NP \) is the diameter of semicircle O. Angles Q, R, and S are right angles, and point P is the midpoint of \( NQ \) . If PQ = 52 feet and NS = 18 feet, the area of the figure can be expressed as \( aπ+b \)  square feet, where a and b are integers. What is the value of \( a−b \) ?