CO-P1 Conic Center

CO-P1 is the Center of the Reference Conic.

Construction of Conic Center

Let A, B, C, D, E be 5 points on the Reference Conic.

Let the tangents at A, B meet at T, and those at B, C meet at TO.

Let M, MO be the midpoints of AB and BC, then the center O is MT.MOTO.

See [19].

Construction of Conic Tangents

Let d = AB, e = BC, a = CD, b = DE, c = EA, then bd.ce cuts a in a point lying on the tangent at A.

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