If a year only had 364 days then we could use the same calendar every year. but actually most years have 365 days, and a leap year has 366 days. for the relevant years, a leap year occurs when the year is divisible by 4
i was just about to throw my calendar away for 2013 when i wondered when i would first be able to reuse it. in which year would that be? justify your answer.

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