Best Answer

3x^2 + 3y^2 = 75

Divide both sides by '3'

Hence

x^2 + y^2 = 25

x^2 + y^2 = 5^2

In the Pythagorean Geometry

The circle equation is

x^32 + y^2 = r^2

Hence 5^2 = r^2

Hence r = 5 (The radius)

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3x² + 3y² = 75

Q: What is the radius of the circle whose equation is 3x² plus 3y² equals 75?

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I think you have missed out an equals sign. If you mean x2 + y2 = 16, then the radius is 4.

I think you have missed out an equals sign. If you mean x2 + y2 = 16, then the radius is 4.

If that means = 36 then then the radius of the circle is 6 units

x2 + y2 = 2

The equation of circle is (x−h)^2+(y−k)^2 = r^2, where h,k is the center of circle and r is the radius of circle. so, according to question center is origin and radius is 10, therefore, equation of circle is x^2 + y^2 = 100

x2 + y2 = r2, where r is the radius.

It is x2 + y2 = 4

(x-0)² + (y-0)² = r²

x2 + y2 = 49

The area of a circle is equal to that of a triangle whose base has the length of the circle's circumference (distance around the circle) and whose height equals the circle's radius which comes to Pi multiplied by the radius squared. Area of Triangle 1/2 *base*height

sqrt(8) = 2*sqrt(2) = 2.83

General formula for a circle is X squared + Y squared = radius squared. So the answer would be x squared + y squared = 2.64575131 squared