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# Area of circles using radians watch

1. How do I find the area of the rest of the circle when sector angle is pi/5 with a radius of 1.2cm (in radians) this is page 95 edexcel C2 question 1C
2. Begin by calculating the area of the minor sector.

You can then calculate the area of the entire circle, and then subtract the above to find the area of shaded region.
3. the same as normal, find the area of the sector and take it away from the area of the whole circle. or find the area of the leftover amount... so you have pi*r^2 - 1/10 * pi*r^2 OR 9/10 *pi*r^2
4. Oh and remember that there is pi in radians is 180degrees. Once you remember that fact it'll make all your calculations easier.
5. (Original post by Guccigirl)
How do I find the area of the rest of the circle when sector angle is pi/5 with a radius of 1.2cm (in radians) this is page 95 edexcel C2 question 1C

and you know the sector area.

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