The law of sines and the law of cosines both provide a way to solve a triangle given three pieces of information about the sides and angles (other than being given three angles). In what two scenarios must you begin solving the triangle by using the law of cosines?

Can someone tell me if this is perpendicular? !

How do you write y-10=2 (x-8) in standard form

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