Finding Arc Length And Sector Area Worksheet. Find the length of arc cd. Find the length of arc ab.

Find the length of arc ab. Find the length of arc cd. To calculate the sector’s area from arc length, consider the formula arc length = rθ.

To Calculate The Sector’s Area From Arc Length, Consider The Formula Arc Length = Rθ.

Plug in the known values to find the missing r or θ and proceed to calculate the area of sectors as usual. Find the length of arc cd. Area = \dfrac {1} {2}\textcolor {red} {r}^2\textcolor {blue} {\theta}\\ = 21r2θ area = \dfrac {1}.

As The Angle Is In Radians, We Can Use This Formula To Calculate The Area Of The Sector: