Toán Lớp 7: cho tam giác abc có góc abc 70 độ. tia phan giac cua goc A cat BC tai D. ke AH vuong goc voi BC
a, tinh so do BAC
b, tinh so do ADH
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Toán Lớp 7: cho tam giác abc có góc abc 70 độ. tia phan giac cua goc A cat BC tai D. ke AH vuong goc voi BC
a, tinh so do BAC
b, tinh so do ADH
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