The angle of a sector is 30 .If its radius is 42 cm ,them the length of the arc of the sector is
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Answer:
22 cm
Step-by-step explanation:
Given:
Angle of sector (∅) = 30°
Radius (r) = 42 cm
To find:
The length of the arc
Solution:
As we know length of arc = 2πr × ∅/360
So,
Important Points
Arc: An arc is curved part of circle .
Sector : A sector is also a part of circle which consist two radius and an arc .
Formula Related to Arc and Sector
Let, r be the radius , ∅ (Angle NOM) be the angle .
Area of Sector = πr² × ∅/360°
Length of Arc = 2πr × ∅/360°
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