Sagot :
RADIUS
Given
- Area of the Sector (A) = 9π
- Central Angle (c) = 90°
- Radius (r) = ?
A = cπr² / 360
9π = (90°)(π)(r²) / 360
9π = 90πr² / 360
(9π)(360) = 90πr²
3240π = 90πr²
3240π / 90π = 90πr² / 90π
r² = 36
√r² = √36
r = 6
[tex] \: [/tex]
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