As part of an environmental science project, you measure the trees in a park to the nearest foot. Your data are shown at the right. You want to estimate the number of trees between 30 . and tall. Choose a method for estimating and state any assumptions you make . What is your estimate ? Explain your reasoning . Ages When Recruited

21 23 21 18 22 19 24 22 21 20 21

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