A sector with an area of 26pi cm^2 has a radius of 6cm. What is the central angle measure of the sector in radians?
A: 13pi/9
B: 9pi/13
C: 13pi/18
D: 18pi/13

A sector with an area of 26pi cm2 has a radius of 6cm What is the central angle measure of the sector in radians A 13pi9 B 9pi13 C 13pi18 D 18pi13 class=

Respuesta :

Answer:

A

Step-by-step explanation:

The area (A ) of the sector is calculated as

A = area of circle × fraction of circle

   = πr² × [tex]\frac{x}{2\pi }[/tex] ( x is the measure of the central angle ) , thus

π × 6² × [tex]\frac{x}{2\pi }[/tex] = 26π

36π × [tex]\frac{x}{2\pi }[/tex] = 26π (cancel 36π and 2π )

18x = 26π ( divide both sides by 18 )

x = [tex]\frac{26\pi }{18}[/tex] = [tex]\frac{13\pi }{9}[/tex] → A

   

Answer:

A

Step-by-step explanation:

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