xet tam giac OAC(goc A = 90 do) va tam giac OBC(goc B = 90 do) co
goc AOC=goc BOC(gt)
canh OC chung
\(\Rightarrow\)tam giac OAC = tam giac OBC(canh huyen - goc nhon)
Hai tam giac vuong bang nhau la:ACO va OCB
Vi hai tam giac vuong ACOva OCB ghep lai tao thanh hinh tu giac ABCO
Mk lam the ko biet co dung ko ,ban xem lai thu!!!