Area of a triangle

, would really appreciate it.

Which of the angle pairs can be classified as vertical angles? ∠1 and ∠2 ∠2 and ∠4 ∠3 and ∠2 ∠4 and ∠1 ∠3 and ∠1

Write the expression in simplified radical form. show all steps and work including any foil method work. (hint: use the conjugate. no decimal answers.) (9-2√3)/(12+√3)

Two streets intersect at a 30- degree angle. at the intersection, the are four crosswalks formed that are the same length. what type of quadrilateral is formed by the crosswalks?