Parabolas, circles, introduction to the ellipse.

1. Circles ...
turn up in the
darnedest places
Concentric chaos by flickr user Erik Kolstad

2. A parabola has vertex (0, 0) and focus on a coordinate axis. Write the
equation of the parabola if:
(a) the focus is: (i) (4, 0) (ii) (-6, 0) (iii) (0, 3)
(b) the directrix is defined by the line y = 8.

3. The Circle
P(x, y)
r
F(h, k)
Standard Form for the
equation of a Circle

4. Which equations represent circles? Find the radius, and the coordinates of the
centre of each circle.
NOT A
CIRCLE

6. HOMEWORK