Question

What exactly is AG? I've been lost

Answer 1

AG = 10

Explanation:

On each median the distance from the vertex to the centroid is twice as long as the distance from the centroid to the midpoint , then

AG =
`(2)/(3)` × AE =
`(2)/(3)` × 15 = 10

Answer 2

AG is the line that has been shown in the image.

I believe AG = 10