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Item 6

DD is the centroid of △ABC△ABC. What is the value of xx when BD=−x+45BD=−x+45 and BF=21xBF=21x?

 Mar 31, 2021
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D is the centroid of △ABC. What is the value of x when BD = 45 - x and BF = 21x?

(I assume that BF is a median of triangle ABC)

 

BD : DF = 2 : 1

 

45 - x = 2(21x)

 

x = 45/43

 Mar 31, 2021

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