Circles Form 2

This is an arc length; a part of the circumference.

• Yes.

• No.

This is a segment; an area bounded by an arc and a chord.

• Yes.

• No.

This is an arc length; a part of the circumference. What's the formulae?

• Arc length $=\frac{x}{360}\times2\pi r$

• Arc length $=\frac{x}{360}\times\pi r^2$

This is a sector; an area bounded by an arc and two radii.

• Yes.

• No.

This is a sector; an area bounded by an arc and two radii. What's the formulae?

• Area of sector $=\frac{x}{360}\times2\pi r$

• Area of sector $=\frac{x}{360}\times\pi r^2$

This is a chord; a straight line joining any two points on the circumference.

• Yes.

• No.

This is a diameter; a straight line joining two points on the circumference and passing through the centre.

• Yes.

• No.

This is a diameter; a straight line joining two points on the circumference and passing through the centre.

• Diameter = 2 (radius)

• Radius = 2 (diameter)

This is a radius; a straight line from the centre to the circumference of the circle.

• Yes.

• No.

This is a circumference; the perimeter of a circle.

• Yes.

• No.