Core2 More circles questions - solutions 30/01/12

The worksheet:

https://docs.google.com/leaf?id=0B2J1T-insOmpOTRlMDRjODEtNWEzMy00MWVlLTg4ODgtYjE5OTMyZjg0MWE5&hl=en_GB

Solutions to all the questions on the worksheet:

https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid=0B2J1T-insOmpMWQ5OTcxNzItOWQ0Ni00ODkzLTk0ZGYtYjhiYmM1MzdjZmIx&hl=en_GB

***NB** there is a mistake on the solution to question 1: diameter should be root 80 which makes the radius root 20 which means the equation is correct on the LHS but should read 20 on the RHS