What is the length of segment kr?

a. 3 mm
b. 7 mm
c. 8.6 mm
d. 17.2 mm

Option D.

Step-by-step explanation:

we know that

The Centroid of a Triangle is the center of the triangle that can be calculated as the point of intersection of all the three medians of a triangle. The centroid divides each median in a ratio of

In this problem the point R represent the centroid of triangle JKL

therefore

substitute the value

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.