Parabolas
March 11, 2015
Wax Paper Activity
Parabolas
*Identify the vertex, focus
and directrix.
**Graph and write equations
for parabolas.
**Identify the vertex, focus
and directrix.
Lesson objectives
Teachers' notes
A parabola is a set of all points
(x,y) that are equidistant from
the directrix (a fixed line) and
the focus (a point not on the
fixed line)
Focal Width (p) - distance from
V to F or V to directrix
opens up/down
opens left/right
Write an equation for each parabola.
1. F(4,1) directrix y=3 Parabolas
March 11, 2015
2. F(3,2) directrix x = ­1 3. V(4, 1) F(4, 3)
4. V(1,2) F(6, 2)
5. Graph and list all of the details of the parabola. Vertex:
Focus:
Directrix:
6. Graph and list all of the details of the parabola. Vertex:
Focus:
Directrix:
AoS:
6. Write the equation in standard form. Identify the Vertex, Focus and Directrix.