Answer:
x = 17, x = 112, x = 100
Step-by-step explanation:
First problem:
From what I can see, there is a 90º angle present. When you subtract 73 from 90, you get 17, so x is 17.
Second problem:
x and 112 are vertical angles. "Vertical angle theorem, no matter how you throw your skewers or pencils so that they cross, or how two intersecting lines cross, vertical angles will always be congruent, or equal to each other." - https://tutors.com/math-tutors/geometry-help/vertical-angles
Third problem:
The base is a straight, horizontal line, which means that it is 180º. Subtract 80 from 180, you get 100. Therefore, x is 100.
