If the circumference of the circle is equal to $144$144 cm, find the length of the solid arc.

The diagram shows a sector of a circle of radius $4$4 units, formed from an angle of size $180^\circ$180°.

Find the exact length of the arc.

The diagram shows a sector of a circle of radius $4$4 units, formed from an angle of size $135^\circ$135°.

Find the length of the arc rounded to two decimal places.

The diagram shows a sector of a circle of radius $6$6 units, formed from an angle of size $290^\circ$290°.

Extend the concept of similarity to determine arc lengths and areas of sectors of circles.

Identify, determine, and/or use the arcs, semicircles, sectors, and/or angles of a circle.

Find the area of a sector of a circle.