In order to determine the are of the sector, use the following formula:
[tex]A=\frac{\theta}{360}\cdot\pi r^2[/tex]
where,
θ = m
π = 3.14
r = DE = 3
replace the previous values of the parameters into the formula for A and simplify:
[tex]A=\frac{36}{360}\pi(3)^2\approx2.83[/tex]
Hence, the area of the given sector is approximately 2.83 squared units
