Answer:
x has a value of 71, making D the correct answer.
Step-by-step explanation:
Because this is an isosceles triangle, we know that the bottom two angles are equal. We also know that the sum of the angles inside a triangle will always come to 180°. With that in mind, we can simply subtract 38° from 180° and divide by two to get the correct answer.
[tex]x = (180 - 38) / 2\\= 142 / 2\\= 71[/tex]
So the correct answer is D, 71 degrees.
