Convert Degree to Radian: 225A$=\frac{2\pi}{4}$B$=\frac{3\pi}{4}$C$\frac{5\pi}{4}$D$=\frac{\pi}{4}$Answer: C. $\frac{5\pi}{4}$ Read Explanation: To convert Degree to Radiant =225×π180=225\times{\frac{\pi}{180}}=225×180π=5π4=\frac{5\pi}{4}=45π Read more in App