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Handout
Math Words

Mathwords: Directrix of a Parabola

For Students 9th - 10th Standards
A definition and example that shows what a directrix of a parabola is.
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Handout
Math Words

Math words.com: Vertex, Parabola

For Students 9th - 10th Standards
The definition is given for what the vertex is. An example illustration is also given.