In a circle, a 225 degrees sector has area 490pi in2. what is the radius of the circle?

We know that

area of a sector=(∅*pi/360°)*r²> when ∅ is in degree
r=√[360°*(area of a sector)/(∅*pi)]

area of a sector=(∅/2)*r²> when ∅ is in radians
r=√[2*(area of a sector)/∅]

let's calculate the radius of the two ways

1) r=√[360°*(area of a sector)/(∅*pi)]
area of a sector=490*pi in²
∅=225°
 r=√[360°*(490*pi)/(225°*pi)]> r=√784> r=28 in

2) r=√[2*(area of a sector)/∅]
area of a sector=490*pi in²
∅=225°> convert to radians> ∅=225°*pi/180> ∅=1.25*pi
r=√[2*(490*pi)/(1.25*pi)]> r=√[980/1.25]---> r=√784> r=28 in

the answer is 
the radius is 28 in