# Find the center and radius ,and sketch the raph of the equation. X^2+Y^2=4 how to find the mid point?

Find the center and radius ,and sketch the graph of the equation.
${X}^{2}+{Y}^{2}=4$
how to find the mid point?
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Mira Spears
${x}^{2}+{y}^{2}=4$ is the formula for a circle with radius 2.
The center is 0,0 and you can graph it to show that center bysolving the equation for y:
$y=\sqrt{4-{x}^{2}}$
And
$y=-\sqrt{4-{x}^{2}}$
###### Not exactly what you’re looking for?
Pierre Holmes
It looks like a standard form
Standard form: Ax + By = C
in this case, you have x = a and b=y, leading to your weirdequation.
C/A = x-intercept = 4/x
C/B = y-intercept = 4/y