Let http://data.artofproblemsolving.com/...ed43937642.gif be the set of points

http://data.artofproblemsolving.com/...3015722080.gif

Find the area of http://data.artofproblemsolving.com/...ed43937642.gif.

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- January 7th 2014, 06:42 PMorangeUrgent Polar etc. coordinates
Let http://data.artofproblemsolving.com/...ed43937642.gif be the set of points

http://data.artofproblemsolving.com/...3015722080.gif

Find the area of http://data.artofproblemsolving.com/...ed43937642.gif. - January 7th 2014, 07:02 PMHallsofIvyRe: Urgent Polar etc. coordinates
If it is so urgent, have you not

**tried**anything yourself? Did you not see that this is part of a circle? It is the part of a circle of radius 6 beyond radius 2. What is the area of a circle of radius 6? What is the area of a circle of radius 2? " " is the area of the "washer" with inner radius 2 and outer radius 6. And , a quarter of a circle. - January 7th 2014, 07:20 PMorangeRe: Urgent Polar etc. coordinates
Thank you. So you subtract the littlest circle from the biggest one and divide by 4?

- January 9th 2014, 09:43 AMHallsofIvyRe: Urgent Polar etc. coordinates
Yes.