Examlex
For email links, use anchor elements to link to an email address by including the href attribute followed by _____ and then the email address.
Parabola
The graph of a quadratic function, represented as a symmetric curve that opens either up or down.
Focus
A point used in the definitions of conic sections, such as ellipses and hyperbolas, from which distances are measured to define the curves.
Vertex
The point where two lines, or edges, of a geometric figure meet; in the context of a parabola, the peak or the lowest point, depending on its orientation.
Circle
A round plane figure, every point of which is equidistant from a fixed center point, defined by the equation (x-h)^2 + (y-k)^2 = r^2 in a coordinate plane.
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