Đáp án:
4D 1A 2 B. 3 B
Giải thích các bước giải:
Xét tam giác ABC vuông tại A có
AB^2+BC^2=AC^2
=>AB^2+12^2=13^2
AB^2+144=169
AB^2=169-144
AB^2=25
AB^2=5^2
=>AB=5
Nocopy
Xin ctlhn ạ
1. A
2. B
3. B
4. D
Cho mk xin CTLHN ạ
Mọi người giúp em vs ạ. Em đg cần gấp
Tìm n,biết: n-2 chia hết cho n+5
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