1.130度
2.3边 6边
3.130度 9边
这3个题都用到多边形内角和的公式（N-2）*180,还有内角度数小于180度
Shopping Center has many shops,such as restaurants,fast food shops,appliance shopping centers,bookstores,clothing stores,shoe stores,sporting goods shops.Shopping Center 9:00 am open for business,22 o'clock closing.Many people visit every day.