en.wikipedia.org/wiki/Circumference

The circumference of a closed curve or circular object is the linear distance
around its edge. The circumference of a ...

www.mathopenref.com/circumference.html

Circumference, Perimeter of a circle. From Latin: circum "around" + ferre "to carry"
. The distance around the edge of a circle. Also 'periphery' , 'perimeter'. Try this ...

www.mathgoodies.com/lessons/vol2/circumference.html

The distance around a circle is called the circumference. The distance across a
circle through the center is called the diameter. Pi is the ratio of the ...

www.answers.com/Q/The_perimeter_of_a_circle_the_distance_around_a_circle

circumference.

www.aaamath.com/geo612x4.htm

The circumference of a circle is the distance around the outside of the circle. It
could be called the perimeter of the circle. How to find the circumference of a
circle ...

www.mathsteacher.com.au/year9/ch14_measurement/02_circle/circle.htm

The circumference is the distance around the circle. The circumference, C, of a
circle is given by the formula. where r is the radius of the circle, and ...

www.web-formulas.com/Math_Formulas/Geometry_Perimeter_of_Circle.aspx

Perimeter is the distance around a closed figure and is typically measured in
millimetres (mm), centimetres (cm), metres (m) and kilometres (km). These units
are ...

www.eduplace.com/parents/resources/homework/pdf/geometry.pdf

Definitions: perimeter: the distance around a figure circumference: the distance
around a circle area: the number of square units in a region. ∏ (pi): the ratio of ...

www.math.com/tables/geometry/circles.htm

circumference: the distance around the circle. diameter: the longest distance from
one end of a circle to the other. origin: the center of the circle. pi ( pi ) ...

www.mathvillage.info/node/159

To answer this question, we need to realize that the figure is just half of a circle.
This means we will still be using the formula . However, there will be a twist in ...