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loveofmaths · Sep 21, 2009, 01:37 AM

Find the perimeter of a segment whose angle is 45 and radius is 6 cm

colbtech · Sep 21, 2009, 01:46 AM

1. Calculate the circuference of a 6cm radius circle.
2. Calculate the length of an arc of 45° of this circle.
3. Don't forget to add the to radii.

Unknown008 · Sep 21, 2009, 07:06 AM

I'll add something, perhaps more advanced.

There is another way of finding the length of an arc. That's from $s=r\theta$

Here the length of an arc 's' is given by the product of the radius 'r' and the angle 'theta' which is in radians (another way of expressing an angle, where $180^{\small{o}} = \pi$ )

1. Convert 45 degrees into radians.
2. Use the formula to find the length of the arc.
3. Add the arc, and two radii to get the perimeter.