A cylinder has a diameter of 5 centimeters and a height of 50 millimeters. Which of the following steps should be done first in order to find the surface area of the cylinder?

convert the diameter and the height to the same unit
determine the radius and multiply by 2
calculate the circumference of the circle
multiply the circumference of the circle by the height of the cylinder

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