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huong54355310


1/Cho tam jAC abc vuông tại a, có ab=9cm,bc=15cm
a)tinh do dai acva so sanh cac goc cua tam jacabc
b)tren tia doi tia ab lay d sao cho a la trung diem cua doan thangbd.cm tam jac bcd can
c)goi k la trung diem cua canh bc.duong thangdk cat canh ac tai m.tinh do dai doan thang mc
d)duong trung truc cua doan ac cat duong thang dc tai q.cm bmq thang hang
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may cau a,b,c to lam dc nhung cau cuoi thi ko jup to nha@
=((b-(@-)