Chapter 10 - Section 10.1 - The Parabola and the Circle - Exercise Set - Page 610: 66

See graph

$$2x^2+2y^2=\frac{1}{2}$$ $$x^2+y^2=\frac{1}{4}$$ This is a circle with center (0,0) and a radius of $\frac{1}{2}$ units. Points are: $$(\frac{1}{2},0)$$ $$(-\frac{1}{2},0)$$ $$(0,\frac{1}{2})$$ $$(0,-\frac{1}{2})$$ Plot these points and connect with a smooth circle.