Display Title

Definition--Circle Concepts--Equation of a Circles

Equation of a Circle

Equation of a Circle Image

Topic

Circles

Definition

The equation of a circle in a plane is (x − h)2 + (y − k)2 = r2, where (h , k) is the center and r is the radius.

Description

The equation of a circle is a fundamental concept in geometry, representing the set of all points equidistant from a given center. It is widely used in fields such as computer graphics, navigation, and physics, where precise positioning and movement of circular objects are required. The standard equation provides a framework for analyzing and solving problems involving circles, such as finding intersections and tangents. In mathematics education, mastering the equation of a circle is crucial for students as it provides a foundation for understanding more complex geometric shapes and concepts, such as ellipses and hyperbolas, and helps in developing algebraic and geometric reasoning skills.

Equation of a Circle
How could the equation of a circle 
help to locate a satellite in orbit?

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