alleryThe equation of a circle with centre at h, k and radius r is derived from its:
ADeduction
BDepiction
CDefinition
DDeflection
Answer & Solution
Correct answer: C. Definition
1. The equation is not assumed but obtained.
2. It follows from every point being equidistant from the centre.
3. The equation of the circle with a given centre and radius is derived from that definition.
4. So the answer is its definition.
_Source: syllabus Mathematics, Ch 10 'Conic Sections'_
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