A triangle has vertices with coordinates A(1,2), B(5,2), and C(3,8). What is the y-coordinate of its centroid?
Show answer & explanation
Correct answer: D
Explanation
Given:
A(1,2), B(5,2), C(3,8)
By the formula:
y-coordinate of the centroid = (y₁ + y₂ + y₃) / 3
y₁ = 2, y₂ = 2, y₃ = 8
y = (2 + 2 + 8) / 3
= 12 / 3
= 4