The calculated value of the variable x in the trapezoid is 15
How to determine the value of the variable x
From the question, we have the following parameters that can be used in our computation:
The trapezoid ABCE
This trapezoid is an isosceles trapezoid.
In the isosceles trapezoid, the sum of the opposite angles is 180 degrees.
Then the sum of the angle B and angle D will be 180°.
∠B + ∠D = 180°
9x + 3x = 180
12x = 180°
x = 180°/12
Evaluate
x = 15°
Hence, the value of the variable x is 15.