If the radius of a circle is equal to $1.8$1.8 cm, find its circumference correct to three decimal places.
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 $135^\circ$135°.
Find the length of the arc rounded to two decimal places.
The diagram shows a sector of a circle of radius $14.2$14.2 mm, formed from an angle of size $235^\circ$235°.
Find the length of the arc rounded to two decimal places.