Name this locus
Two similar triangles are drawn inside one of these shapes in the Butterfly Theorem. An angle whose rays both intersect this shape twice is subject to the Secant-Secant Theorem, and the power of a point depends on its location relative to the center of one of these shapes. This shape is generated in polar coordinates by setting the value of r equal to a constant. Name this locus [LOE-kus] of all points in a plane a fixed distance from a fixed point, a shape whose area can be found by multiplying pi times radius squared.
Two similar triangles are drawn inside one of these shapes in the Butterfly Theorem.
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