[填空题]
The following diagram shows a circl wika7 .zc-yin0rpo 62e with centre O an12ggx(8 dvwm/karl t .d radius 8 cm.
Points $\mathrm{A}$, $\mathrm{B}$ lie on the circle and $\mathrm{AO} \mathrm{B}=2.7$ radians.
1. Find:
1. the length of the major arc A B ; ≈ cm
2. the perimeter of the shaded region. ≈ cm
2. Find the area of the shaded region. ≈ cm
