cho tam giac ABC vuong tai A duong cao AH

AC=? HB=? HC=? KHI AB=8cm HC-HB=8cm

mn jup mk nha

mn cho mk hoi

vs MC.MD=MH.MO thi tu giac CHOD noi tiep ko?

giai he PT 1/X +1/Y=1/18

X+Y=27

JUP MK VS MN

a^2+b^2+c^2-2(ab +bc+ca) >= -3

jup mk vs

1.He watched an..........soccer match on TV last night(excited)

2.Nowdays,the environment is........polluted (extreme)

dc thi giai thick nhaa .Thanks