3 Circles: A Roulette Table One application of a circle is a Roulette Table.The spinning of the wheel keeps the ball on the rim.Slower spinning lessens the centrifugal force and the ball drops in a slot.
4 EllipsesCenter: (h, k)Foci Formula:(where a > b)
5 Ellipses: The Solar System One application of the ellipse is the orbits of the planets in our solar system.The sun represents one of the foci.
6 Parabolas Vertical Parabolas Vertex: (h, k) Horizontal Parabolas Focus: (h, k+c)Directrix: y = k – cHorizontal ParabolasVertex: (h, k)Focus: (h+c, k)Directrix: x = k – c
7 Parabolas: A Light Filament One application of a parabola is the filament in a flashlight.The mirrors on the filament cause the reflection of the bulb to shine outward.
9 Hyperbolas: Underwater Radar One application of a hyperbola is the LONAR radar system.This technology is used in submarines. This device detects the intersection of sound waves.The intersection points create a hyperbola.