N
nckn23


1) cho hinh thang ABCD co AC va BD vuong goc voi nhau , duong cao AH = 12 , BC=15 tinh dien tich cua hinh thang :Mfoyourinfo::Mfoyourinfo::Mfoyourinfo::Mfoyourinfo::Mfoyourinfo:2) cho tam giac ABC vuong tai A , tia phan giac BD co AD=4 , CD=5 tinh BD
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>-:Mpayup::M014::M014::M014::M014::M014: noi ro cax jai jum e lun na
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