Math, asked by Nuran, 11 months ago

IF (1, 1, 1) is the centroid of the triangle with vertices (2a, 3, 7) (- 4, 3b, - 8) . and (8, 4, 6c) find a,b,c

Answers

Answered by shine2710
0

centroid formula

 \frac{x1 + x2 + x3}{3}  \\  \frac{y1 + y2 + y3}{3}   \\  \frac{z1 + z2 + z3}{3}

 \frac{2a - 4 + 8}{3}  = 1 \\  \frac{3 + 3b + 4}{3}  = 1 \\  \frac{7 - 8 + 6c}{3}  = 1

a =  \frac{ - 1}{2}  \\ b =  \frac{ - 4}{3}  \\ c =  \frac{2}{3}

Answered by dhanalakshmis2524
0

Answer:

a = -1/2 ,  b = - 2 ,   c = 2/3

Step-by-step explanation:

centroid of the triangle  =  (1 ,1,1 )

(2a - 4 + 8)/ 3  = 1                    (3 + 3b + 4)/3 =1                 (7 -8 + 6c)/3 = 1

2a + 4 = 3                                        3b + 7  = 1                      6c - 1 = 3

2a  = 3 -4                                              3b = 1 - 7                      6c  = 3 + 1

 a  = - 1/2                                               b  = - 6/3                       c = 4/6

                                                                  = - 2                              = 2/3

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