Definition--Circle Concepts--Circumference
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Geometry >> Circles >> Definition of a Circle

Definition--Circle Concepts--Circumference

Circumference

Circumference Image

Topic

Circles

Definition

The circumference of a circle is the distance around the circle, calculated as C = 2πr.

Description

The circumference is a fundamental concept in geometry, representing the perimeter of a circle. It is widely used in fields such as engineering, design, and manufacturing, where precise measurements of circular objects are required. The formula 

C = 2πr 

illustrates the relationship between the circumference, radius, and the constant π, highlighting the proportional increase of circumference with the radius. In mathematics education, understanding the circumference is essential for students as it provides a basis for exploring more complex topics like arc length and surface area, and helps in developing spatial reasoning and problem-solving skills.

Circumference
If you know the radius of the traffic circle and the time it 
takes for a car to complete one circle, how can you calculate the car's speed?

For a complete collection of terms related to Circles click on this link: Circles Collection.

Common Core Standards CCSS.MATH.CONTENT.HSG.C.A.2, CCSS.MATH.CONTENT.HSG.C.A.1, CCSS.MATH.CONTENT.HSG.C.A.3, CCSS.MATH.CONTENT.HSG.C.A.4, CCSS.MATH.CONTENT.4.MD.C.5.A, CCSS.MATH.CONTENT.7.G.B.4
Grade Range 4 - 8
Curriculum Nodes Geometry
    • Circles
        • Definition of a Circle
Copyright Year 2021
Keywords defnitions, geometry, circle