A parabola is a curve where any point is at an equal distancefrom:
- a fixed point (the focus), and
- a fixed straight line (the directrix)
- the axis of symmetry (goes through the focus, at right angles to the directrix)
- the vertex (where the parabola makes its sharpest turn) is halfway between the focus and directrix.
this is a really good picture of a parabola! plus the simple bullet points helped me understand what i need to remember for parabolas
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