Algebra › Section K · Conics › Topic K.2
Parabolas
Meet the parabola again - this time as a conic section, a curve carved from a cone, defined without any equation at all. And meet its sideways twin, the parabola that opens left and right and refuses to be a function.
In this topic
- A parabola is a slice of a cone
- Focus, directrix, vertex
- Vertical parabolas, recalled
- Horizontal parabolas: the sideways twin
- Worked example: opening right
- Worked example: opening left
- Intercepts of a horizontal parabola
- Common mistakes to avoid
- Key takeaways
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