In a circle of radius 28 cm, an arc subtends an angle of 45° at the centre, then find the length of the

arc (in cm).​

1 thought on “In a circle of radius 28 cm, an arc subtends an angle of 45° at the centre, then find the length of the <br /><br />arc (in cm).​”

1. Sector (OAPBO) of a circle is given whose
   radius(r)=28cm
   and central angle (θ)=45
   ∘

   ∴ Area of sector (A)=
   360
   ∘

   πr
   2
   θ
   ​

   =
   7
   22
   ​
   ×
   360
   ∘

   28×28×45
   ∘

   ​

   ⇒ Area of sector =308cm
   2
   is the required area.
   solution

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