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Which of the following points is the fourth vertex needed to create a rectangle with vertices located at (−29, 11), (−4, −2), and (−29, −2)?

(−29, −11)
(−29, 2)
(−4, 11)
(−4, 2)

User Glenrothes
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1 Answer

5 votes

Answer:

Explanation:

To create a rectangle, we need to find a point that is the same distance from (-29, 11) as it is from (-4, -2).

First, let's find the midpoint of the line segment connecting (-29, 11) and (-4, -2):

Midpoint = ((-29 + (-4))/2, (11 + (-2))/2) = (-33/2, 9/2)

This midpoint is equidistant from (-29, 11) and (-4, -2). To find the fourth vertex of the rectangle, we need to find a point that is also equidistant from (-29, -2) and the midpoint.

The x-coordinate of this point must be -29, so we only need to find the y-coordinate:

distance from (-29, -2) to midpoint = distance from (x, y) to midpoint

sqrt[(-33/2 - (-29))^2 + (y - 9/2)^2] = sqrt[(-4 - (-29))^2 + (-2 - 11)^2]

Simplifying the equation, we get:

sqrt[(5/2)^2 + (y - 9/2)^2] = sqrt[25 + 169]

(5/2)^2 + (y - 9/2)^2 = 194

Simplifying further, we get:

(y - 9/2)^2 = 179/4

y - 9/2 = +/- sqrt(179)/2

y = 9/2 +/- sqrt(179)/2

Since (-29, -2) has a lower y-coordinate than the midpoint (-33/2, 9/2), we must choose the negative square root:

y = 9/2 - sqrt(179)/2

Therefore, the fourth vertex needed to create a rectangle is (-29, 2).

So the answer is (B) (-29, 2).

User David Jay Brady
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