Two lines intersect at a point, forming ∠1 , ∠2 , ∠3 , and ∠4 . ∠1 and ∠2 are supplementary angles. ∠2 and ∠4 are vertical angles. m∠1=120° what is the measure of ∠4 ? 30° 60° 90° 120°

Apolynomial has two terms. check all of the factoring methods that should be considered. common factor difference of cubes sum of cubes difference of squares perfect-square trinomial factoring by grouping