anonymous
  • anonymous
Triangle ABC has vertices A (1,5) B (9,7)and C (7,3). M is the midpoint of AB and N is the midpoint of BC. Which of the following is the length of MN? A. 3 B. 4 C. 5 D. 6
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
First: Use the midpoint formula to find M and N. \(\huge (\frac{ x_2+x_1}{ 2 },\frac{ y_2+y_1 }{ 2 })\)
anonymous
  • anonymous
M is the midpoint of A and B, and A (1, 5) & B (9, 7). x1 y1 x2 y2
anonymous
  • anonymous
N is the midpoint of B and C, and A (9, 7) & B (7, 3). x1 y1 x2 y2

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anonymous
  • anonymous
Once you found the points of M and N, use the distance formula to find the length of MN. DISTANCE FORMULA: \[\huge \sqrt{(x_2 - x_1)^2+(y_2-y_1)^2}\]

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