Dividing a circle’s circumference by its diameter always yields the same number: pi. This constant equals about 22/7, or 3.14. Pi is an infinite decimal—its digits go on forever. People have calculated its never-ending numbers since antiquity. Pi even has its own holiday! Every year on March 14 (3/14), math lovers celebrate the irrational number by holding competitions to recite its digits; writing “pi-kus” (haikus about pi); and eating delicious pies.
CCSS: 6.EE.A.2.C, 7.EE.B.3, MP1, MP6
TEKS: 6.3D, 6.7D, 7.3A, 7.3B
