Answer: the sum of angles in a triangle equals 180°. you’ve been given two of the three angles, which are 60 and 42. when you add those together you get 102. subtract 102 from 180. 180-102=78. this means the last angle is equal to 78. so set the equation for the last angle equal to 78, and solve for x.
Explanation:
hope this helped! also x=8 if u need that
