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hoahongxanh_92


1)Cho tam giac ABC can tai A (AB=AC). goc A=100*.Mla diem nam trong tam giac sao cho goc MBC=10*;goc MCB=20*.Tinh goc AMB.
2)Tren canh BC cua tam giac ABC lay diem P sao cho PC=2PB.Tinh goc ACB biet goc ABC=45* va goc APC=60*.
2)Tren canh BC cua tam giac ABC lay diem P sao cho PC=2PB.Tinh goc ACB biet goc ABC=45* va goc APC=60*.