the corresponding area of the sector of a circle of radius is 1.21 cm with an interior of 30° at the center make an angle find the length of
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Answer:
Area of sector of circle =30 cm
2
radius of circle =15 cm
Area of sector =
360
θ
×πr
2
360
θ
=
πr
2
A
=
π×15×15
30
=
15π
2
now length of arc =2πr=
360
θ
=2π×15×
15
2
Length of arc =4 cm
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