Convert the following angles from degrees to radians and gradians: 22.5 degrees and 330 degrees.

"°5: $22.5^\circ$"

• الإزديان: $$22.5^\circ \times \frac{\pi}{180} = \frac{22.5\pi}{180} = \frac{45\pi}{360} = \frac{\pi}{8} \text{ rad}$$
• الغراد: $$22.5^\circ \times \frac{10 \text{ درجة}}{9^\circ} = \frac{225}{9} = 25 \text{ grades}$$

"°6: $330^\circ$"

• الإزديان: $$330^\circ \times \frac{\pi}{180} = \frac{330\pi}{180} = \frac{11\pi}{6} \text{ rad}$$
• الغراد: $$330^\circ \times \frac{10 \text{ درجة}}{9^\circ} = \frac{3300}{9} = \frac{1100}{3} \text{ grades}$$