Question

Question

Triangle ABC
is drawn on a coordinate plane with vertices A(−2,−3)
, B(4, 0)
, and C(−2, 2)
and medians indicating the midpoint of each of the line segments AB¯¯¯¯¯¯¯¯
, BC¯¯¯¯¯¯¯¯
, and CA¯¯¯¯¯¯¯¯
. Prove that the medians meet at a single point by finding the centroid. (1 point)
Responses

(0,−13)
open paren 0 comma negative 1 third close paren

(0, 53)
open paren 0 comma 5 thirds close paren

(0, 0)
open paren 0 comma 0 close paren

(−1, 53)

Answer 1

To find the centroid of triangle ABC, we can use the formula for the centroid (G) of a triangle with vertices A(x₁, y₁), B(x₂, y₂), and C(x₃, y₃):

\[ G\left(\frac{x_1 + x_2 + x_3}{3}, \frac{y_1 + y_2 + y_3}{3}\right) \]

Given the vertices of triangle ABC:

• A(-2, -3)
• B(4, 0)
• C(-2, 2)

Let's substitute these coordinates into the centroid formula.

1. Calculate the x-coordinate: \[ \frac{-2 + 4 - 2}{3} = \frac{0}{3} = 0 \]

2. Calculate the y-coordinate: \[ \frac{-3 + 0 + 2}{3} = \frac{-1}{3} \]

Thus, the coordinates of the centroid G are: \[ G\left(0, -\frac{1}{3}\right) \]

So the centroid of triangle ABC is \((0, -\frac{1}{3})\).

Among the provided responses, the correct one is:

(0, -1/3) or (0, -\frac{1}{3}).