Given: 2 and 4 are vertical angles. Prove 2 is congruent to 4

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?

Which graph represents the equation y =4x

Percent increase and decrease. original number: 45 new number: 18