If p=28 what does 5p squared - 5p equal?

Need ! easy 6th grade work! i will put as much points as i can! you so much! i’m learning this in math and it’s soo

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

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