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HELP PLEASE ASAP!!! Khan Academy unit test!

A circle with radius 3 has a sector with a central angle of 9/17 π radians .


What is the area of the sector?

Respuesta :

Answer:

The area of sector is 7.48 unit²

Step-by-step explanation:

Given as :

The radius of circle = r = 3 unit

The measure of central angle =Ф = [tex]\dfrac{9}{17} \pi[/tex] radian

Let The area of sector = A unit²

Now, According to question

Area of sector = π× radius × radius × [tex]\frac{\Theta }{360^{\circ}}[/tex]

Or, A = π× r × r × [tex]\frac{\Theta }{360^{\circ}}[/tex]

Or, A = π× r × r ×[tex]\frac{\frac{9}{17}\Pi  }{360^{\circ}}[/tex]

where  π = 3.14

180° = π radian

So, 360° = [tex]\frac{\Pi }{180^{\circ}}\times 360^{\circ}[/tex] = 2 π radian

Or,, A = π× r × r × [tex]\frac{\frac{9}{17\Pi }}{2\Pi }[/tex]

Or, A =  π× r × r × [tex]\dfrac{9}{34}[/tex]

Or, A = 3.14 × 3 unit × 3 unit × [tex]\dfrac{9}{34}[/tex]

Or, A = 3.14 × 3 unit × 3 unit × 0.2647

  A = 7.48 unit²

So,The area of sector = A = 7.48 unit²

Hence, The area of sector is 7.48 unit²  Answer