In quadrilateral WXYZ, WC = 2x + 5 and CY = 3x + 2. What must x equal for quadrilateral WXYZ to be a parallelogram?

Verified Answer :

  • Recognize that for a quadrilateral to be a parallelogram, its diagonals must bisect each other, meaning the point of intersection \(C\) is the midpoint of diagonal \(WY\).
  • Establish the equation \(WC = CY\) based on the given expressions \(2x+5\) and \(3x+2\).
  • Solve the equation \(2x+5 = 3x+2\) to find \(x = 3\).
  • Confirm the validity by verifying that both segments result in positive lengths of 11.
  • Final answer: \(\boxed{3}\).

Explanation

  1. Analyze properties of a parallelogram

To determine the value of \(x\) that makes the quadrilateral \(WXYZ\) a parallelogram, we must rely on the fundamental properties of parallelograms. One essential property is that the diagonals of a parallelogram bisect each other. This means that the point of intersection of the diagonals, which is point \(C\) in this case, must be the midpoint of each diagonal.

Given that point \(C\) lies on the diagonal \(WY\), for \(WXYZ\) to be a parallelogram, \(C\) must be the midpoint of \(WY\). Consequently, the length of segment \(WC\) must be equal to the length of segment \(CY\). We are provided with the expressions for these lengths:
\(WC = 2x + 5\)
\(CY = 3x + 2\)

  1. Set up and solve the equation for x

We set the lengths of the segments equal to each other to solve for \(x\):
\[2x + 5 = 3x + 2\]

Subtract \(2x\) from both sides of the equation:
\[5 = x + 2\]

Subtract 2 from both sides of the equation:
\[x = 3\]

Thus, the value of \(x\) that satisfies the condition for the diagonal segments is \(x = 3\).

  1. Verify the results

To ensure the result is geometrically valid, we must verify that the segment lengths are positive for \(x = 3\):
\(WC = 2(3) + 5 = 6 + 5 = 11\)
\(CY = 3(3) + 2 = 9 + 2 = 11\)

Since both segments have a length of 11, which is greater than zero, the condition for the diagonal bisecting is satisfied. Thus, the value of \(x\) for which \(WXYZ\) is a parallelogram is \(x = 3\). The final answer is \(\boxed{3}\).

Examples

In structural engineering and architecture, understanding the properties of a parallelogram is crucial for ensuring stability in frames. For example, if you are designing a bridge truss or a hinged gate that must maintain a constant shape while shifting, ensuring that the diagonals bisect each other allows for smooth, predictable motion. By setting the diagonal segments correctly, such as \(WC = CY = 11\), you guarantee the geometric integrity of the design.