Select the letter of the best answer choice. use 3.14 or 22/7 for π
what is the circumference of a circle with a diameter of 21 ft? round your answer to the nearest foot.
a) 132 ft
b) 66 ft
c) 44 ft
d) 33 ft

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.