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Let's try this out with a particular triangle. Consider the triangle ABC with A = (5, 4), B = (-9, 6), and C = (1, -4).

(a) Let D, E, F be the midpoints of \(\overline{AB}\) , \(\overline{AC}\)\(\overline{CB}\)  respectively. Find the equations of medians \(\overline{AD}\)\(\overline{BE}\), and \(\overline{CF}\)

 Feb 10, 2024
 #2
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I'll  do  one.....the calculation of the  other two is similar

 

(The median to BC is AF , not CF)

 

Mid point of BC  = [ (-9 + 1)  /2 ,  (6 + -4) /2)  =  (-4, 1) =  F     (5,4) (-4,1)

 

Slope of a line through AF  =  ( 1 - 4)  / (-4 - 5)  =  -3/-9  = 1/3

 

Equation of line containing  median AF   using the  slope and (5,4)  =

 

y = (1/3) ( x - 5) + 4

 

y = (1/3)x - 5/3 + 4

 

y = (1/3) x + 7/3

 

 

cool cool cool

 Feb 11, 2024
edited by CPhill  Feb 11, 2024
 #3
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Thank you! I understand now. Happy early Valentines day!

 Feb 14, 2024

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