An equilateral triangle is folded in half. What is x, the height of the equilateral triangle? please help a girl out :)

Given: lines a and b are parallel and line c is a transversal. prove: 2 is supplementary to 8 what is the missing reason in the proof? statement reason 1. a || b, is a transv 1. given 2. ∠6 ≅ ∠2 2. ? 3. m∠6 = m∠2 3. def. of congruent 4. ∠6 is supp. to ∠8 4. def. of linear pair 5. ∠2 is supp. to ∠8 5. congruent supplements theorem corresponding angles theorem alternate interior angles theorem vertical angles theorem alternate exterior angles theorem

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge