**parabola:**a curve formed from all the points that are equidistant from the focus and the directrix.

**vertex**

**:**midway between the focus and the directrix

**focus**

**:**a point inside the parabola

**directrix**

**:**a line outside the parabola and perpendicular to the axis of symmetry

*conics formula for parabola:*$p = \frac{1}{{4a}}$

*p*: distance between the vertex and the focus / directrix.

*a*: coefficient of the squared term