Use the image to answer the question.

A coordinate plane's axes range from negative 8 to 8, both by 1-unit increments. A triangle made up of vertices upper A, upper B, and upper C is plotted, and the coordinates of the points are given.

Prove that when the three medians of the triangle are drawn, they meet at a single point. What is the point of the centroid?

(1 point)
Responses

(83,2)
left parenthesis Start Fraction 8 over 3 End Fraction comma 2 right parenthesis

(103,0)
left parenthesis Start Fraction 10 over 3 End Fraction comma 0 right parenthesis

(3,2)
left parenthesis 3 comma 2 right parenthesis

(38,2)

1 answer

To find the centroid of triangle ABC, we need to use the formula for the centroid, which is the average of the coordinates of its vertices. The centroid \( G \) is given by:

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

Assuming the coordinates of points A, B, and C are \((x_1, y_1)\), \((x_2, y_2)\), and \((x_3, y_3)\), let's calculate the centroid step by step.

  1. Identify the coordinates of the vertices: You mentioned there are coordinates for points A, B, and C, but did not specify them. For the sake of illustration, let's say:

    • Point A: \( (x_1, y_1) \)
    • Point B: \( (x_2, y_2) \)
    • Point C: \( (x_3, y_3) \)

    For determining the centroid exactly, you'll need to replace these hypothetical coordinates with the actual coordinates from the image you referenced.

  2. Calculate the centroid:

    • Substitute the actual coordinates into the formula:

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

  3. Provide the final answer:

    • Check the resulting coordinates against the options you provided.

If you can provide the actual coordinates for points A, B, and C, I can help you with the exact calculation, or you can proceed with the steps above to find the centroid and match it with the choices:

  • \( \left( \frac{8}{3}, 2 \right) \)
  • \( \left( \frac{10}{3}, 0 \right) \)
  • \( (3, 2) \)
  • \( \left( \frac{38}{2}, 2 \right) \)

Just plug in the numbers from the vertices and you’ll find which option corresponds to the computed centroid.