A quadrilateral is described as having a set of parallel lines and two congruent angles. Which of the following is it required to be? Check all that apply. (When thinking about what a shape is required to be consider this example: A quadrilateral with 4 right angles is REQUIRED to be a rectangle because that's the definition of a rectangle. It COULD be a square, but doesn't have to be because I didn't say anything about all its sides being the same length)

guess at question:

a vertical line intersects the graph of g(x,y) = 0 at two points. what conclusion follows about the function f(x) implicitly defined by g(x,f(x)) = 0?

the domain of f(x) cannot include the x coordinate of any such vertical line.

informally, f(x) is not a function, and

g(x,y)=0 cannot be solved for y uniquely.

the relation r = {(x,y) such that g(x,y) = 0} is a function if

for all (a,b) ∊ r and (c,d) ∊ r, a=c implies b=d.

step-by-step explanation:

hello! just here for points! though i wish i knew!