如图,A点在B处的北偏东40度的方向,C点在B处的北偏东85度的方向,A点在C处的北偏西45度的方向求∠BAC及∠BCA的度数
角bac75度,角bca60度,延长点c所在的坐标系即可
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扫描下载二维码C 岛在A岛的南偏东45度方向,B岛在A岛的南偏东80度方向,C岛在B岛的南偏西20度方向,求张角∠ACB的度数图这是几何题目，要写因为所以
180-(90-45-(90-80))-(180-20-(90-(90-80)))=65∠CAB=(90-45)-(90-80)=35∠ABC=180-20-(90-(90-80))=80∠ACB=180-∠CAB-∠ABC=180-35-80=65
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180-（80-45）-（180-80-20）=55∠CAB=80-45∠ABC=180-80-20∠ACB=180-∠CAB-∠ABC
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