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sleet_krkn [62]
3 years ago
9

What is the radius of the circle whose equation is x2 + y2 = 8? 2 4 64

Mathematics
2 answers:
Naily [24]3 years ago
8 0

Answer:

The equation of circle of radius r whose centre is the origin (0, 0) ,

It is given by:    x^2+y^2 =r^2                    ......[1]

Given the equation: x^2+y^2 =8

To find the radius of the circle;

Compare the given equation with [1] we have;

r^2 = 8

Taking square root both sides we get;

r = \sqrt{8} = 2\sqrt{2} units

Therefore, the radius of the circle is, 2\sqrt{2} units

umka2103 [35]3 years ago
6 0
It would be
\sqrt{8}
Or
2\sqrt{2}
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