1)AB=√9+16=√25=5 AH=16/5=3,2 HB=9/5=1,8 CH=√3,2*1,8=√16*0,36=4*0,6=2,4 2)AB=√25+24=√49=7 AH=25/7=3 4/7 HB=24/7=3 3/7 CH=√3 4/7*3 3/7=√25*24/49=5*2√7/7=10√7/7 3)AB=√a²+a²=√2a²=a√2 AH=a²/a√2=a/√2=a√2/2 HB=a²/a√2=a/√2=a√2/2 CH=√a√2/2 *a√2/2 =a√2/2