Answer:
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Step-by-step explanation:
let's recall that a Centroid in a triangle cuts the Medians into a 2:1 ratio, or namely CG : GD are in a 2: 1 ratio, we can also look at it that the side CD is 2/3 of CD whilst GD is 1/3 of CD, so

The distance between the points (2,1) and (14,6) on a coordinate is C. 13 units
Look at attached photo
first divide each line into the number as shown in the denominator