Answer:
A) 18 m
Step-by-step explanation:
The centroid is located ⅔ of the distance from the vertex to the midpoint of the opposite side. Thus,
AG/AD =⅔
12/AD =⅔
Multiply each side by 3: 36/AD = 2
Multiply each side by AD: 36 = 2AD
Divide each side by 2: AD = 18
The measure of the median AD is 18 m.
Check:
12/18 = ⅔
⅔ = ⅔
