directrix
Chinese equivalent: 准线
directrix The fixed line in the definition of a parabola, which together with the focus determines the parabola.
Syllabus path: Geometry and Algebra › Plane Analytic Geometry › Equations and Properties of Parabolas
CSCA Exam Prep
This term is aligned to the CSCA undergraduate admissions exam syllabus. Continue with the linked tutorial and topic practice.
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CSCA Mathematics Exam Glossary
Definition
directrix The fixed line in the definition of a parabola, which together with the focus determines the parabola.
Related tutorial and examples
Equations and Properties of Parabolas
Equations and Properties of Parabolas The parabola is the only conic section with an "eccentricity e = 1 ". The key to this topic is applying the geometric definition. In the CSCA exam, mastering the four standard equations and using the "Definition Method" are crucial. 1. Defini…
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