circle, circumference of a circle, diameter, pi, radius
TEKS 7(1)(D), 7(1)(F), 7(1)(G), 7(8)(C), 7(9)(B)
Circumference is the distance around a circle.
Exploring circumference Look for a pattern.
Find a relationship between the distance around and the distance across a circle to determine an approximate formula for circumference.
The circumference of a circle is about three times its diameter. You can use this information to estimate an answer.
Π (π) is the ratio of a circle's circumference C to its diameter d.
Approximations for pi (π) π is a nonterminating and nonrepeating decimal. Both 3.14 and 22/7 are good approximations for π.