Pls answer :) 15 points ;)

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

40 points. given: two congruent angles ∠c and ∠r are supplementary. prove: ∠r and ∠c are both right angles. it doesn't have to be exactly 10 rows. statements reasons1. 1. 2. 2. 3. 3. 4. 4. 5. 5. 6. 6. 7. 7. 8. 8. 9. 9. 10. 10.

Write the percent as a fraction or mixed number in simplest form. 0.8%