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Length of an arc of a circle of radius 5 cm subtending central angle measuring 45^o is
Option: 1
$\frac{\pi}{4}cm$

Option: 2
$\frac{5\pi}{2}cm$

Option: 3
$\frac{5\pi}{4}cm$

Option: 4
None of these

Answers (1)

best_answer

Let s be the length of the arc

$s=r\theta$

r = 5 cm

$\theta=45^\circ=\frac{\pi}{4}$

$s=5\times \frac{\pi}{4}cm=\frac{5\pi}{4}cm$

Posted by

Devendra Khairwa

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