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In a circle, a 90° sector has area 64π ft2. What is the radius of the circle?
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In a circle, a 90° sector has area 64π ft2. What is the radius of the circle?

User Austin Greco
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2 Answers

3 votes
the area of a circle is Pi R² and u do the calculation 
User Patryk Imosa
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3 votes
s-area of a sector
S=πr^2n°/360°
r^2=360°S/πn°
=360°64π/90°π
=64*4
r=√4*4*4*4(64=4*4*4)
r=16ft
User Daan Luttik
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