Question

if (1,4) is the centroid of a triangle and two vertices are (4, -3) and (-9, 7), then the third vertex is
a)(8,7)
b)(7,8)
c)(8,8)
d)(6,8)

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Answer 1

Answer:

correct answer is c)

Step-by-step explanation:

x=X1+X2+X3/3

1=4-9+X3/3

3=4-9+X3

3-4+9=X3

8=X3

Similarly,

y=y1+y2+y3/3

4=-3+7+y3/3

12=4+y3

12-4=y3

8=y3