A (-3,-1)

B (1,5)
C (4,3)
D (0,-3)

Determine the coordinates of the rectangle, then compute the area.

a. 22 units^2
b. 11 units^2
c. 52 units^2
d. 26 units^2

1 answer

To find the area of the rectangle formed by the points A(-3, -1), B(1, 5), C(4, 3), and D(0, -3), we first need to identify which points are the vertices of the rectangle.

Let's plot the points:

  • A(-3, -1)
  • B(1, 5)
  • C(4, 3)
  • D(0, -3)

To see which points form the rectangle, we need to check the distances between the points to determine the dimensions.

  1. Finding the distance between points:

    • Distance AB: \[ \sqrt{(1 - (-3))^2 + (5 - (-1))^2} = \sqrt{(1 + 3)^2 + (5 + 1)^2} = \sqrt{4^2 + 6^2} = \sqrt{16 + 36} = \sqrt{52} \]

    • Distance AC: \[ \sqrt{(4 - (-3))^2 + (3 - (-1))^2} = \sqrt{(4 + 3)^2 + (3 + 1)^2} = \sqrt{7^2 + 4^2} = \sqrt{49 + 16} = \sqrt{65} \]

    • Distance AD: \[ \sqrt{(0 - (-3))^2 + (-3 - (-1))^2} = \sqrt{(0 + 3)^2 + (-3 + 1)^2} = \sqrt{3^2 + (-2)^2} = \sqrt{9 + 4} = \sqrt{13} \]

    • Distance BC: \[ \sqrt{(4 - 1)^2 + (3 - 5)^2} = \sqrt{(3)^2 + (-2)^2} = \sqrt{9 + 4} = \sqrt{13} \]

    • Distance BD: \[ \sqrt{(0 - 1)^2 + (-3 - 5)^2} = \sqrt{(-1)^2 + (-8)^2} = \sqrt{1 + 64} = \sqrt{65} \]

    • Distance CD: \[ \sqrt{(0 - 4)^2 + (-3 - 3)^2} = \sqrt{(-4)^2 + (-6)^2} = \sqrt{16 + 36} = \sqrt{52} \]

  2. Identifying rectangle vertices: The opposite sides must be equal in length:

    • Sides AB and CD have the same length \(\sqrt{52}\).
    • Sides AD and BC have the same length \(\sqrt{13}\).

Thus, the rectangle is defined by points A, B, D, and C.

  1. Finding the lengths of sides:

    • Length AB (or CD) = \(\sqrt{52} = 2\sqrt{13}\).
    • Length AD (or BC) = \(\sqrt{13}\).
  2. Computing the area: The area \(Area\) of the rectangle is given by: \[ Area = length \times width = (2\sqrt{13}) \times (\sqrt{13}) = 2 \cdot 13 = 26 , \text{units}^2. \]

Thus the area of the rectangle is 26 units².

The answer is: d. 26 units²