Numerous items that we encounter every day are “round” in shape, including coins, bracelets, bottle caps, the Earth, wheels, etc. The circular shape is frequently referred to as a “circle” in everyday speech. A circle is a closed plane figure made up of all the points that are equally spaced apart from a fixed point in the same plane. To put it another way, a circle can be thought of as the locus of a point traveling on a plane while maintaining a constant distance from a fixed point.

## What is the “Name that Circle Part Worksheet”?

The Name That Circle Part Worksheet addresses the various components of a circle, including how to recognize the essential components of a circle from a diagram, how to recognize the essential components of a circle from a definition, and how to depict a circle with each component labeled.

### What will the students learn through the “Name that Circle Part Worksheet”?

This worksheet will help the learners identify the key aspects of the part of the circle and also label them. They will also learn the correct notation of the parts of the circle.

### Instructions on how to use the “Name That Circle Part Worksheet”

Use this math exercise to carefully identify the parts of a circle and their definitions. At the end of the discussion, several activities will be provided to test the learners’ knowledge of the new topic.

A reflective section is included at the end of this worksheet to encourage learners to evaluate their own thinking and how they did it during the lesson.

### Conclusion

Anybody can define a circle. They are everywhere, and we see them every day. What we might not realize is how significant circles are and how their unique characteristics make them valuable in a variety of contexts. It’s essential to comprehend the characteristics and identify the parts of a circle in order to comprehend how this unusual shape might be used to resolve problems and comprehend the world around us.

## Parts of a Circle

**Center**

A circle is made up of all the points in a plane that are equally spaced apart from the circle’s center. “Circle Q” refers to a circle with a center Q.

**Radius**

The radius of a circle is the distance between its center and any given point on its surface. In the circle below, the radius is QP

**Diameter**

The diameter of a circle is the distance across the circle, through its center. In the circle below, the diameter is RP.

The diameter is twice the radius.

**Chord**

A segment with points on the circle as its endpoints is called a chord. In the circle below, the chord is ST . Diameter is also a chord since it is a segment whose endpoints are points on the circle.

**Secant**

A line that crosses a circle twice is known as a secant. In the circle below, the secant line is

**Tangent**

A tangent is a line in a circle’s plane that only ever touches the circle once. In the given circle, the tangent line is

**Point of Tangency**

The point of tangency is the point where a tangent line touches the circle once. In the circle below, point V is the point of tangency.

**Sector**

The pie-shaped portion of a circle known as a sector is made up of the arc and its two radii. In the circle below, the shaded part is a sector.

**Segment**

A region enclosed by a chord and a corresponding arc located between the chord’s endpoints is referred to as a segment of a circle. In the circle below, the shaded part is a segment of a circle.

**Minor Arc**

The shortest arc that connects two points on a circle is called a minor arc. A minor arc’s measure is equal to the angle’s central measure and is less than 180 degrees. In the circle below, the minor arc is

**Major Arc**

The longer arc that joins two circle ends is known as a major arc. A major arc’s measure is greater than 180 degrees and equal to 360 degrees minus the measure of the minor arc with the same endpoints. In the circle below, the major arc is

**Semicircle**

A half-circle. This could be regarded as a sector where the diameter has caused the circle to split.

**Central Angle**

The central angle of a circle is an angle formed by any two radii in a circle, with the center of a circle as the vertex. In the circle below, the central angle is XQY

## Name that Circle Part worksheet (with answers)

**Direction: **Fill in the blank. Use the diagram and the word bank to identify each part of a circle.

Word Bank |

Center |

Radius |

Diameter |

Chord |

Secant |

Tangent |

Point of Tangency |

Minor Arc |

Major Arc |

Central Angle |

**Complete the following sentences:**

- The radius is _________ the length of the diameter.

- The diameter is ________ the length of the radius.

**Reflection:**

- How is a circle different from other shapes?

- Compare chord and diameter. How are they comparable? What distinguishes them from one another?

**Answer Key:**

**Complete the following sentences:**

- The radius is
**half**the length of the diameter.

- The diameter is
**twice**the length of the radius.

**Reflection:**

- How is a circle different from other shapes?

**In contrast with other shapes like squares, triangles, ellipses, etc., a circle is a shape with all of its points equally distanced from its center and no edges.**

- Compare chord and diameter. How are they comparable? What distinguishes them from one another?

**Any line segment spanning the circle from one side to the other is known as a chord, while the chord that passes through the center of the circle is known as a diameter. The diameter is also the largest chord that the circle can support. Therefore, all diameters are chords, but not all chords are diameters.**

You can download this worksheet here.