**What You'll Learn?**

**What is Radius?**

The distance from the center of a circle to any point on the circle itself is exactly the same. This distance is called the radius of the circle.

**What is Diameter? **

The diameter is the length of the line through the center that touches two points on the edge of the circle.

**TOP DIFFERENCES BETWEEN RADIUS AND DIAMETER:**

RADIUS | DIAMETER |
---|---|

Definition | |

The radius is the length from the midpoint of the circle to the outer edge of the circle. | Diameter is the full length of the circle running from the edge, through the midpoint, all the way to the other side. |

Denoted by | |

The radius is represented by the lowercase letter “r.” | The diameter of a circle is represented by the letter “d.” |

Origin | |

The radius of a circle runs from its center to its edge. | diameter runs from edge to edge and cuts through the center. |

Formula | |

radius (r=d2)! | diameter (d=2r) |

**Conclusion:**

The **Radius** is the distance from the center outwards. The **Diameter** goes straight across the circle, through the center. The **Circumference** is the distance once around the circle. Both Radius and Diameter are related to a circle only.

Also, Read Differences between Symmetrical and Asymmetrical.