legendarygame007 legendarygame007
  • 20-07-2019
  • Mathematics
contestada

Find the length of the median from the vertex B of ∆ABC whose vertices are A(1, -1), B(0, 4) and C(-5, 3)

Respuesta :

jimrgrant1 jimrgrant1
  • 20-07-2019

Answer:

[tex]\sqrt{13}[/tex]

Step-by-step explanation:

The median from B intersects the midpoint of AC

Find the midpoint using the midpoint formula

midpoint = [ 0.5(1 - 5), 0.5(- 1 + 3) ] = (- 2, 1 )

Calculate the length using the distance formula

d = √ (x₂ - x₁ )² + (y₂ - y₁ )²

with (x₁, y₁ ) = - 2, 1 ) and (x₂, y₂ ) = (0, 4 )

d = [tex]\sqrt{(0+2)^2+(4-1)^2}[/tex]

  = [tex]\sqrt{2^2+3^2}[/tex]

  = [tex]\sqrt{4+9}[/tex] = [tex]\sqrt{13}[/tex] ≈ 3.6 ( to 1 dec. place )

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