In this lessons, us will learn the following parts the a circle: diameter, chord, radius,arc and tangent.

You are watching: A chord that passes through the center of a circle

We will also learn around congruent circles, concentric circles and also intersecting circles.

**Related Pages**CirclesTangent of A CircleChords the A Circle

The complying with figures display the different parts the a circle: tangent, chord, radius, diameter,minor arc, major arc, boy segment, major segment, minor sector, significant sector. Role downthe web page for an ext examples and also explanations.

### Circle

In geometry, a circle is a closeup of the door curve developed by a collection of pointson a aircraft that space the very same distance indigenous its center *O*. Thatdistance is recognized as the radius that the circle.

### Diameter

The diameter of a circle is a heat segment the passesthrough the center of the circle and has its endpoints ~ above the circle. Every the diameters the thesame circle have actually the same length.

### Chord

A **chord** is a line segment with both endpoints on the circle. The diameter is a specialchord the passes with the center of the circle. The diameter would be the longest chordin the circle.

### Radius

The radius that the one is a heat segment from the centerof the circle to a point on the circle. The many of radius is radii.

In the above diagram, *O* is the center of the circle and and

### Arc

An arc is a part of a circle.

In the diagram above, the component of the circle native B to C creates an arc.

An arc deserve to be measure in degrees.

In the one above, arc *BC* is same to the ∠*BOC* the is 45°.

### Tangent

A tangent is a line the touches a circle at just one point.A tangent is perpendicular come the radius at the allude ofcontact. The point of tangency is whereby a tangent line touches the circle.

In the above diagram, the heat containing the clues B and also C is a tangent to the circle.

It touches the circle at allude B and also is perpendicular come the radius.Point B is dubbed the point of tangency.

is perpendicular come i.e.### Parts that A Circle

The following video clip gives the interpretations of a circle, a radius, a chord, a diameter, secant, secant line, tangent, congruent circles, concentric circles, and intersecting circles.

A **secant line** intersects the one in two points.

A **tangent** is a line the intersects the circle in ~ one point.

A **point that tangency** is where a tangent line touches or intersects the circle.

**Congruent circles** room circles that have actually the same radius but different centers.

**Concentric circles** room two circles that have actually the same center, however a different radii.

**Intersecting Circles**: two circles may intersect at two points or in ~ one point. If theyintersect at one suggest then they have the right to either be externally tangent or within tangent.

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Two circles that perform not intersect can either have a usual external tangent or typical internaltangent.In the **common outside tangent**, the tangent does no cross in between the 2 circles.In the **common inner tangent**, the tangent crosses in between the two circles.

### Parts the A Circle, consisting of Radius, Chord, Diameter, central Angle, Arc, and Sector

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