How do you convert #r^2 = x^2 + y^2# into a cartesian equation?

Related questions

• What is the polar equation of a horizontal line?
• What is the polar equation for #x^2+y^2=9#?
• How do I graph a polar equation?
• How do I find the polar equation for #y = 5#?
• What is a polar equation?
• How do I find the polar equation for #x^2+y^2=7y#?
• How do I convert the polar equation #r=10# to its Cartesian equivalent?
• How do I convert the polar equation #r=10 sin theta# to its Cartesian equivalent?
• How do you convert polar equations to rectangular equations?
• How do you convert #r=6cosθ# into a cartesian equation?