Question

5 multiple choice 4 points use the figure below to answer the following question. what is the measure of angle x in the figure above? 257° 57° 237° 77°

Explanation:

Step1: Recall triangle angle sum

The sum of angles in a triangle is $180^\circ$.

Step2: Set up the equation

$x + 39^\circ + 84^\circ = 180^\circ$

Step3: Calculate sum of known angles

$39^\circ + 84^\circ = 123^\circ$

Step4: Solve for $x$

$x = 180^\circ - 123^\circ = 57^\circ$

Answer:

B. $57^\circ$