Which is the best definition of an isosceles triangle?

O A. A triangle in which no two sides are congruent
O B. A triangle that has three congruent sides
O C. A triangle that has at least two congruent sides

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.