GEOMETRIC CONSTRUCTION OF CONIC LOCUS
- Autore:
- Prof.ssa Maiolino Daniela
As you know a generic conics is the locus of the point of a plane which have to follow a rule.
In this case the law is:
the points of the plane where the ratio between the distance from a fixed point (THE FOCUS) and a fixed straight line (THE DIRECTRIX) is constant.
The ratio is well known as EXCENTRICITY of the conic and the mathematical equation of a conic is commonly expressed as
d(P,F)=e *d (P,r) or d(P,F)/d (P,r)=e.
• if e<1 we will get an ellipse
• if e=1 we will get a parabola
• if e >1 we will get an hyperbola
• if e =0 we will get a circumference.
Now is your turn to work. You have to follow this simple instruction in order to obtain a conic by applying its definition