cho 3 diem A,B,C, khong thang hang,ve doan thang BC
ve diem M la trung diem cua doan thang BC
ve tia BA,duong thang AC
ve duong thang AD sao cho M nam giua A va D
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19 tháng 11 2017
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19 tháng 11 2017
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3 tháng 1 2016
a) Trên tia Ox có hai điểm m , n mà om<on(3<6)
nên điểm m nằm giữa o và n
b) vì m nằm giữa o và n
om+mn=on
hay om+mn=6
3+mn=6
mn=6-3
mn=3
=>mn=3cm
c) m là trung điểm của on vì
m nằm giữa o và n
hay om=on =3cm
d) Vì e là trung điểm của đoạn thẳng mn nên
me=\(\frac{mn}{2}=\frac{3}{2}=1,5\)cm
Ta có om+me=oe
hay 3+1,5=oe
4,5=oe
Vậy oe=4,5cm
20 tháng 2 2018
co ai biet lam bai nay khong co the giup minh duoc khong minh dang gap do
21 tháng 12 2015
đâu phải Huy ko pít làm, Huy nói chtt là vào câu hỏi tương tự để trả lời thôi mà bạn! ^^
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