C-14-Q088mediumsingle_mcqIn Construction 12, on ray AXAXAX we cut AE=mAE = mAE=m and EC=nEC = nEC=n. Drawing ED∥CBED \parallel CBED∥CB gives —aAD:DB=n:mAD:DB = n:mAD:DB=n:mbAD:DB=m:nAD:DB = m:nAD: