Parts of a Circle Flashcards

GCSE Mathematics (Edexcel) 1MA1

Radius

The distance from the centre of the circle to any point on its circumference.

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Terms in this set (10)

1

Radius

The distance from the centre of the circle to any point on its circumference.

2

Diameter

A straight line passing through the centre of the circle, connecting two points on the circumference. It is twice the radius.

3

Circumference

The total distance around the edge of the circle.

4

Centre

The fixed point in the middle of the circle that is equidistant from all points on the circumference.

5

Chord

A straight line connecting two points on the circumference of a circle, but not passing through the centre.

6

Arc

A part of the circumference of a circle.

7

Sector

A region of a circle enclosed by two radii and an arc.

8

Segment

A region of a circle enclosed by a chord and the arc it subtends.

9

Tangent

A straight line that touches the circle at exactly one point and does not cross into the circle.

10

Circumference Formula

The formula for the circumference of a circle is C = 2πr or C = πd, where r is the radius and d is the diameter.

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