This shape names an alternative set of trigonometric functions based on it rather than the unit circle.
Feuerbach names one of these shapes passing through the orthocenter of atriangle and centered on the nine-point circle, and Y  names one of these shapeswhose vertices are at the centroid and orthocenter of a triangle. These shapes      √ are called rectangular if their   eccentricity is equal to 2, and one of their axes does not actually contain any points on the shape. This shape is de ned as the6set of all points with a common di erence between their distance from two  xed points. This shape names an alternative set of trigonometric functions based on it rather than the unit circle. For ten points, identify this conic section with two disconnected parts.
Feuerbach names one of these shapes passing through the orthocenter of atriangle and centered on the nine-point circle, and Y  names one of these shapeswhose vertices are at the centroid and orthocenter of a triangle.
hyperbolae [prompt on conic sections before read]