... B4 A =1 cm1 1/3 = 3cm 2 4 AM 1/ AM 1,8 M MB = 3.2 cm AB = cm 2 /AM + MB = cm 3 /AM + MB =AB MB = cm AB = cm 2 /AM +MB = cm 3 /AM + MB AB Khi nµo th× AM + MB = AB? TiÕt - Bµi 8: Tho¸t Tho¸t 1/ Khi ... tËp A M B M A H13 1/ AM = 1,8 cm MB = 3.2 cm AB = cm 2 /AM + MB = cm 3 /AM + MB = AB Tho¸t B H2 1/ AM = cm MB = cm AB = cm 2 /AM +MB = cm 3 /AM + MB ≠ AB Khi nµo th× AM + MB = AB? PhiÕu häc tËp A ... 4cm, BC= 6cm, vËy B n»m gi÷a A,C Sai Tho¸t VÝ Dơ: Cho M n»m gi÷a A vµ B BiÕt AM= 3cm, AB= 8cm TÝnh MB A M Gi¶i: V× M n»m gi÷a A, B nªn AM + BM = AB Thay AM = 3, AB = 8, ta cã: + MB = MB = - MB = (cm)...