Answer
A. Find the proportion of the sector defined by the major arc to the circle, then multiply by the area of the circle.
Explanation
The proportion of the sector defined by the major arc BRJ to the circle with respect to the angle can be given by:
[tex]\frac{\operatorname{Re}flex\angle BCJ}{360}[/tex]
The area of the circle of radius, r is given by πr²
Putting these together, this implies, the proportion of the sector defined by the major arc to the circle, then multiply by the area of the circle.
[tex]\frac{Reflex\angle BCJ}{360}\times\pi r^2[/tex]
