AD平分角BAC,角CAD=角BAD=1/2角BAC=1/2(2角B)=角B,可得AD=BD=4,又BD=2CD,则CD=2,又角C为直角,角CAB+角B=90度,即(2+1)角B=90度,角B=30度,角BAC=60度,AC=1/2AB,BC=CD+BD=6,AC=2倍根号3,AE=2/(2+1)AC=4/3根号3.
能,此时BP=8/3根号3或者2倍根号3.
x=根号5,
AD平分角BAC,角CAD=角BAD=1/2角BAC=1/2(2角B)=角B,可得AD=BD=4,又BD=2CD,则CD=2,又角C为直角,角CAB+角B=90度,即(2+1)角B=90度,角B=30度,角BAC=60度,AC=1/2AB,BC=CD+BD=6,AC=2倍根号3,AE=2/(2+1)AC=4/3根号3.
能,此时BP=8/3根号3或者2倍根号3.
x=根号5,