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Circle - Wikipedia


A circle is a simple closed shape in Euclidean geometry. It is the set of all points in a plane that are at a given distance from a given point, the centre; equivalently  ...

Circles | Geometry | Khan Academy


Explore, prove, and apply important properties of circles that have to do with things like arc length, radians, inscribed angles, and tangents.

Cool math .com - The Geometry of Circles - Radius, Diameter ...


Definitions and formulas for the radius of a circle, the diameter of a circle, the circumference (perimeter) of a circle, the area of a circle, the chord of a circle, arc  ...

Circles: Circumference, Area, Arcs, Chords, Secants, Tangents ...


Circle worksheets, videos, tutorials and formulas involving arcs, chords, area, angles, ... Circles Worksheets and Activities for Math Teachers ... back to Geometry ...

Geometry and the Circle - Math Goodies


A circle is an important shape in the field of geometry. Let's look at the definition of a circle and its parts. We will also examine the relationship between the circle ...

Basic information about circles (Geometry, Circles) – Mathplanet


A circle is all points in the same plane that lie at an equal distance from a center point. The circle is only composed of the points on the border. You could think of  ...

Circle - Math is Fun


Geometry Index ... circle. A circle is easy to make: Draw a curve that is "radius" away from a ... radius diameter circumference: circle/diameter = pi = 3.14159.

Circle Theorems - Math is Fun


Some interesting things about angles and circles. ... Inscribed Angle: an angle made from points sitting on the circle's circumference. inscribed ... Geometry Index.

Formulas for Angles in Circles - Regents Exam Prep Center


Circles - Math.com


Circles. (Math | Geometry | Circles) ... arc: a curved line that is part of the circumference of a circle ... Circumference of Circle = PI x diameter = 2 PI x radius