Explanation: a triangle has 180° in total so do 180-64-45 to get 71° as the internal angle. Then x = 180-71 So x = 109° I got the 180 because the angle between 71° and x adds to 180
Accurate Explanation: Aloha! Basically, as I can see here, you're missing a slope. But you need at least 1 point and a slope in order to write an equation. Hope it helps.