Definitions - Parts of a Circle

Question 1

What is the circumference of a circle?

Answer 1

The circumference of a circle is the distance right round the circle.

Question 2

What is the arc of a circle?

Answer 2

The arc is the curvature of a circle.

Question 3

What is radius?

Answer 3

The radius is
half the diameter of a circle
or
the line from the centre of a circle to any part of the circumference.

Question 4

What is diameter?

Answer 4

The diameter is
any line from one part of the circle that passes through the centre of the circle to the other part of the circumference.

Question 5

What is the sector of a circle?

Answer 5

The sector is a section of a circle.

Question 6

What is a segment of a circle?

Answer 6

The segment is a part of a circle that has been removed a triangle.

Consult notebook.

Question 7

What is a chord of a circle?

Answer 7

The chord is a line from one part of the circumference to the other part of the circumference that does not pass through the centre of the circle.