Question

find the value of x.
x = □

Explanation:

Step1: Use the sum of interior angles formula.

The sum of interior angles of a quadrilateral is \((4 - 2)\times180^{\circ}= 360^{\circ}\).

Step2: Set up an equation.

Let \(x\) be the unknown angle. Then \(x+155 + 137+25=360\).

Step3: Solve the equation.

First, add the known angles: \(155 + 137+25=317\). Then \(x=360 - 317\).

Answer:

\(x = 43\)