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2025-01-31 14:17:49
a) Xét ∆ABD và ∆EBD
Ta có BD cạnh chung
Góc ABD= Góc EBD (gt)
Góc BAD = góc BED ( = 90 độ)
=>∆ABD = ∆ EBD ( c.g.c)
2025-01-31 14:08:10
6 giờ
2025-01-31 13:58:59
Đội 7A = 35
Đội 7B = 40
Đội 7C = 45
2025-01-31 13:56:45
a) x = -3.5 : 15 = -1
b)x = 34 ; y= 24
2025-01-31 13:53:34
a)-13
b ) 11
2025-01-31 13:50:45
a) (-10) : (- 2) = 5
b) 4 : (-2)= (-2)