How is solving an equation with no solution similar to solving an equation that has an infinite number of solutions

Which triangle congruence postulate or theorem justifies my claim that the steps i made using construction paper and scissors produce an isosceles triangle? was it sss, sas, asa, aas, or hl?

The parabola opens: y=√x-4 (principal square root) up down right left

Points a, b, and c form a triangle. complete the statements to prove that the sum of the interior angles of triangle abc is 180