优质解答
由题意知道:标杆长度为3丈=30尺=5步,DG=123步,FH=127步设AB为H步,BD为L步则在△ABG中CD/AB=DG/BG即(5)/(H)=(123)/(123+L) ①在△ABH中EF/AB=FH/BH即(5)/(H)=(127)/(127+1000+L)②由①②得H=1255步=753丈 L=...
由题意知道:标杆长度为3丈=30尺=5步,DG=123步,FH=127步设AB为H步,BD为L步则在△ABG中CD/AB=DG/BG即(5)/(H)=(123)/(123+L) ①在△ABH中EF/AB=FH/BH即(5)/(H)=(127)/(127+1000+L)②由①②得H=1255步=753丈 L=...