What is the area if a sector with radius 10" and measure of arc equal to 45°? a.2.5 (pi) sq in b.12.5 (pi) sq in c.25 (pi) sq in

We know that
[area of a circle]=pi*r²
r=10 in
[area of a circle]=pi*10²> 100*pi in²

if  360° (full circle) has an area of> 100*pi in²
 45°> X
X=45*100*pi/360> x=12.5*pi in²

the answer is
the option B) 12.5*pi in²

Yeah me i need badly

(6,0) i hope it makes enough sense