Area of a sector IB Maths SL

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Area of a sector IB Maths SL

Postby Jane » Sat Apr 13, 2013 4:42 am

IB Mathematics HL– Trigonometry, Mensuration, Area of a sector


How can we find the area of sector with central angle in a circle with radius 7 cm?


Thanks
Jane
 
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Re: Area of a sector IB Maths SL

Postby miranda » Sat Apr 13, 2013 4:50 am

IB Maths HL – Trigonometry, Mensuration, Area of a sector

Let (in radians) be the central angle in a circle with radius r, then the area of the sector formed by angle is given by the following formula:



Therefore the arc length in our case is



Hope these help!! :)
miranda
 
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Re: Area of a sector IB Maths SL

Postby Jane » Sat Apr 13, 2013 5:06 am

Thanks a lot!
Jane
 
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