CAU B tih dien tich thi dc chu CV ko bt >_<
cau b tinh chu vi co!!!!!!!!!!!cau lam dc roi
AC2 = ( 2+2 )2 + ( 4 - 0 )2 = 32 ----> AC = 4\(\sqrt{2}\)
chu vi tam giác ABC là :
AB + AC + BC = 5 + 4\(\sqrt{2}\) + 3 = 8 + 4\(\sqrt{2}\) = 2\(\sqrt{2}\) + 4\(\sqrt{2}\) = 6\(\sqrt{2}\) ( cm )