[填空题]
The following diagram shows a ci3(lq- wag 1oim(n j5sy 3k 6;6agrsourrcle with centre O andu0x50nx66x sa)iun4:di el rs radius 10 cm.
Points $ \mathrm{A}$, $\mathrm{B}$ lie on the circle and $\mathrm{AO}$ $\mathrm{B}=2.2$ radians.
1. Find:
1. the length of the minor arc A B ; cm
2. the perimeter of the shaded region. cm
2. Find the area of the shaded region. $cm^2$
