as well as other important values like the radius and central angle. The arc length formula is Arc Length = Radian Angle x Arc Radius or Arc Length = (Degree Angle/360) x 2π x Arc Radius ...

To calculate the length of the arc, we need to know what fraction of the circle is shown. To do this, we use the angle and compare it with 360˚. This angle is 144°. That is \(\frac{{144^\circ ...

In order to derive the formula to calculate the angle at the centre of the sector, the formulae for the arc length and area of a sector can be rearranged so that we can calculate the fraction of ...