Author Topic: C2 Maths Coordinate Geometry question help 2  (Read 1082 times)

Offline Fenomenoe9

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C2 Maths Coordinate Geometry question help 2
« on: February 15, 2010, 03:56:09 pm »
Hello can anyone help me in this question please.

Circle C1 has the equation x^2 + y^2 - 2ay=0 where (a) is a positive constant.
a) Find the coordinates of the center and the radius of C1

Answering or just explaning what to do would be appreciated THANKS!

Offline astarmathsandphysics

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Re: C2 Maths Coordinate Geometry question help 2
« Reply #1 on: February 15, 2010, 08:14:35 pm »
One mo

Offline astarmathsandphysics

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Re: C2 Maths Coordinate Geometry question help 2
« Reply #2 on: February 15, 2010, 08:17:47 pm »
Hello can anyone help me in this question please.

Circle C1 has the equation x^2 + y^2 - 2ay=0 where (a) is a positive constant.
a) Find the coordinates of the center and the radius of C1

Answering or just explaning what to do would be appreciated THANKS!
a)complete the square
y^2-2ay=(y-a)^2-a^2 so equation becomes x^2+(y-a)^2-a^2=0 so x^2+(y-a)^2=a^2
centre is(0,a) radius is a

Offline Fenomenoe9

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Re: C2 Maths Coordinate Geometry question help 2
« Reply #3 on: February 16, 2010, 12:42:51 pm »
oh nice thats what i did thought i had to find a also... THanks for your help astar!!!!!

Offline Fenomenoe9

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Re: C2 Maths Coordinate Geometry question help 2
« Reply #4 on: February 16, 2010, 12:58:01 pm »
By the way was wondering any1 has solomon worksheets>>????? like coordinate geometry worksheet C but i think they cost money right?

Offline astarmathsandphysics

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Re: C2 Maths Coordinate Geometry question help 2
« Reply #5 on: February 16, 2010, 01:29:19 pm »
There are some solomon worksheets on fep.

Offline astarmathsandphysics

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Offline Fenomenoe9

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Re: C2 Maths Coordinate Geometry question help 2
« Reply #7 on: February 17, 2010, 07:47:26 pm »
lol yeah these are not the ones i want i want the different ones  like specific for example i have the (Coordinate Geometry worksheet C)