Gaokao Math Practice Question
10. (5 分) 已知双曲线 $C: \frac{x^{2}}{a^{2}}-\frac{y^{2}}{b^{2}}=1(a>0, b>0)$ 的离心率为 $\sqrt{2}$, 则点 $(4$, 0) 到 C 的渐近线的距离为 $(\quad)$
- A.$\sqrt{2}$
- B.2
- C.$\frac{3 \sqrt{2}}{2}$
- D.$2 \sqrt{2}$
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