如图,在三角形ABC中,角ABC=60°,点P是三角形ABC内一点,且角APB=角APC=角BPC,PA=8,PC=6 则PB=
解:由题意∠APB=∠BPC=∠CPA=120°,设∠PBC=α,∠ABC=60°则∠ABP=60°-α,∴∠BAP=∠PBC=α,∴△ABP∽△BPC,∴AP BP =BP PC ,BP2=AP•PC∴BP= AP•PC
解:由题意∠APB=∠BPC=∠CPA=120°,设∠PBC=α,∠ABC=60°则∠ABP=60°-α,∴∠BAP=∠PBC=α,∴△ABP∽△BPC,∴AP BP =BP PC ,BP2=AP•PC∴BP= AP•PC