∴∠1=∠2,
在△ABC与△ADC中,
{AB=AD∠
连词成句she /Is /her/ visit/ enjoying ?____is /Chang jiang/ than /the River Thanes/ wider/____walk up /We,re going to /the Great Wall.____won’t/on the blackboard /with chalk /Teachers /write.____is / cheaper /and / safer/ skiing / Running / than.____
— Children today find it hard to focus on study.
— Exactly, as they ________ so many fun things to do.
O是△ABC的外心,且∠ABC+∠ACB=100°,则∠BOC=( )