A chord in a circle is a straight line that connects $2$ any points that are on the circle.

• The chord passes inside the circle and not over it.

• The longest chord in the circle is the diameter

• The radius is not a chord.

A chord in a circle is a straight line that connects $2$ any points that are on the circle.

• The chord passes inside the circle and not over it.

• The longest chord in the circle is the diameter

• The radius is not a chord.

Is it correct to say circumference?

We are here to explain to you what a chord in a circle is in the easiest and most logical way so that you remember it naturally.

Ask yourself... where have you encountered chords in everyday life?

Know that there are strings on a guitar.** Let's remember what they are like:**

We see that the strings pass over the circle in the center of the guitar and that each string connects two points on the circle.

Now, it will be easier for us to remember and naturally understand the properties of the string in the circle.

What is a string in a circle?

A chord in a circle is a straight line that connects any 2 points that are on top of the circle.

The chord passes inside the circle.

**Let's show it in the figure:**

In front of us is a circle.

If we take $2$ points on the top part of the circle and pass a straight line between them that will pass inside the circle,

it will be called a chord.

Pay attention - the line must not pass through the center of the circle (diameter) and can pass between any of the two points that are on the circle.

**Tip:**

You can imagine the guitar's circle and remember what its strings are like.

**Is the diameter a chord?**

Absolutely! The diameter is not just any chord, but it is the longest chord of the circle!

The diameter is a chord that passes through the center of the circle and, therefore, is the longest, connecting $2$ points with the greatest distance in the circle.

Since the green line is a straight line connecting $2$ points on the circle, it is called a chord.

**Is**** the radius**** a chord?**

Absolutely not!

The definition of a chord is a straight line that passes between $2$ points located on the circle.

The radius is the line that connects the center of the circle with a point on the circle and therefore is not a chord.

Wonderful!

Now you know everything you need to know about a chord and can recognize it even in your sleep.

**If you are interested in this article, you might also be interested in the following articles:**

- The center of the circle
- Circle
- Radius
- Diameter
- Pi
- The circumference perimeter
- Circular area
- Arcs in a circle
- Central angle in a circle
- Perpendicular to the chord from the center of the circle
- Inscribed angle in a circle
- Distance from the chord to the center of the circle

**In the** **Tutorela** **blog, you will find a variety of articles about mathematics.**

In which of the circles is the segment drawn the radius?

In which of the circles is the point marked in the circle and not on the circumference?

Calculate the length of the arc marked in red given that the circumference is 12.

8

Calculate the length of the arc marked in red given that the circumference is 12.

2

Calculate the length of the arc marked in red given that the circumference is 6.

$\frac{5}{6}$

Test your knowledge

Question 1

Is it correct to say:

'the circumference of a circle'?

Question 2

Is it correct to say 'the area of a circle'?

Question 3

Where does a point need to be so that its distance from the center of the circle is the shortest?