Question

如图b处在a处的南偏西四十三度方向c处在a处的南偏东14度方向c处在B处的北偏东七十八度方向求角AcB

Answer 1

由题：BD∥AE

∠DBC=78°

∵BD∥AE

∴∠DBA=∠BAE=43°

∵∠DBC=78°

∴∠ABC=78°-43°=35°

∵∠BAC=43°+14°=57°

∴∠ACB=180°-∠BAC-∠ABC=180°-57°-35°=88°