Practicing Success
If the radius of the circle is 42 cm and the angle formed at the centre by an are is 150o. What is the length of the corresponding are? |
66 cm 77 cm 110 cm 55 cm |
110 cm |
We know that, Length of the arc (l) = 2πr × \(\frac{ θ }{360}\) We have, The angle formed by arc at the centre = 150° Radius of the circle (r) = 42 cm Length of the arc = 2π × 42 × \(\frac{ θ }{360}\) = 2 × \(\frac{ 22 }{7}\) × 42 × \(\frac{ 5 }{12}\) = 22 × 5 = 110 cm |