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Earn +20 ptsQ: What is equation of circle?
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What is the equation for the radius of a circle?
The radius of a circle = the diameter of the circle divided by 2
The equation of the inner circle is x2 plus y2 equals 9 The radius of the outer circle is twice the radius of the inner circle What is the equation of the outer circle?
x^2+y^2=36
When you make the circle bigger or smaller which number of the standard equation for a circle centered at the origin changes?
Standard equation for a circle centred at the origin is x2 + y2 = r2 where r is the radius of the circle. If you increase the size of the circle then the radius must increase, so r2 will be larger. eg a circle of radius 2 has the equation x2 + y2 = 4, if the radius increases to 3 then the equation becomes x2 + y2 = 9
What is the equation of the circle with center 2 9 and radius 7?
depends on the equation.
Is The solution set of an equation of a circle is all the points that lie on the circle?
Yes, it is.
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