One hundred eighty degrees equals this many radians, and this number is the area of a circle with radius 1.
times the infinite sum one, minus one third, plus one fifth, minus one seventh, et cetera, equals this number. It is approximately equal to 355/113, 333/106, and (*) 22/7. One hundred eighty degrees equals this many radians, and this number is the area of a circle with radius 1. For 10 points, the ratio of the circumference of a circle to its diameter equals what number, about 3.14?
times the infinite sum one, minus one third, plus one fifth, minus one seventh, et cetera, equals this number.
pi