Question

find the value of u that makes quadrilateral abcd a parallelogram.
u =

Explanation:

Step1: Use the property of parallelogram

In a parallelogram, opposite sides are equal. So, \(3u=u + 18\).

Step2: Solve the equation

Subtract \(u\) from both sides of the equation \(3u=u + 18\).
We get \(3u-u=u + 18-u\), which simplifies to \(2u=18\).
Then divide both sides by 2: \(u=\frac{18}{2}\).

Answer:

\(9\)