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# What is the boundary line of a circle called?

Updated: 4/28/2022 Wiki User

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Circumfrence Wiki User

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Q: What is the boundary line of a circle called?
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### What name is given to the line that traces the edge of a circle?

The curved line that traces the boundary or perimeter of a circle is called the circumference. A straight line that touches the circle at just one point is called a tangent. See the related link, 'The Parts of the Circle', below this answer.

### What is diameter of a circle?

The diameter of a circle is a straight line going from one point on its boundary, through the centre of the circle, to the boundary on the other side.

### Is circumference a chord?

Not at all! The circumference is the length of the boundary of a circle. A chord is a straight line(or a line segment) that passes through two points on the boundary of a circle (or on a curve).

### What is the radius and diameter of a circle?

The radius of a circle is a line segment joining any point of the boundary of the circle to its centre. A diameter is a line segment from a point of the boundary of the circle which passes through the centre and ends at the boundary on the opposite side.

### What is the boundary of a circle?

The boundary or perimeter of a circle is called the circumference. The formula for calculating the length of the circumference is C = 2&pi;r.

### What is the type of circle used on a number line when the boundary point is not part of the solution set?

It is an "open" circle. That is, a circle which is not filled in.

### What is the boundary line under the basket called?

The boundary line under the basket is known as the baseline.

### Is there such thing called as circle line?

Depends on the context: London has a tube (Metro) line which is called the Circle Line.

### The diameter of a circle?

The diameter of a circle is a straight line going from one point on the circumference (the boundary) of the circle, through the centre of the circle, to another point on the circumference.

### What is a line passing through the center of a circle with both end points on the circle called?

This is a line segment called a diameter of the circle.

### What is the name of boundary of circle?

The boundary or perimeter of a circle is its circumference.