Q. Fill in the Blank. 1) ----- is the distance around a closed figure. 2) The distance around a circular region is called it's -----. 3) 1 acre= ----- m sq. 4) The area of a circular ring with outer and inner radii r1 and r2, respectively,is ----- Pls ans fast....needed urgently Share with your friends Share 3 Neha Sethi answered this 1) Perimeter. 2) Circumference 3) 4046.86 m2 4) Annulus 3 View Full Answer Lekisha Gupta answered this Experts pls ans....... I have my exam. 0 Franklin Kujur answered this please ask questions a week before exam -1