Calculate the length of an arc of a circle diameter 14 cm, which substends an angle of 90o at the center of the circle
-
\(\frac{7Ο}{2}\) cm
- 7Ο cm
- 14Ο cm
- \(\frac{7Ο}{4}\) cm
The correct answer is: A
Explanation
Length of an arc = \(\frac{ΞΈ}{360}\) x 2Οr
\(\frac{90}{360}\) x 2 x Ο x 7
= \(\frac{7Ο}{2}\)cm\(^2\)