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UNIT 10 : THE CONICS
LESSON 2: THE CIRCLE
Definition: A circle is a locus (set) of points each of which is a constant
distance
from a
fixed point. The fixed point is the centre of the circle and the fixed distance is the radius.
![Text Box: Main Ideas:
· The equation of a circle, centre the origin and radius r is:
· The equation of a circle, centre (h, k) and radius r [standard form] is:
· The equation of a circle in general form is;
Use completing the square to put in standard form](./circle_files/image005.gif)
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LESSON 2: THE CIRCLE
Definition: A circle is a locus (set) of points each of which is a constant
distance
from a
fixed point. The fixed point is the centre of the circle and the fixed distance is the radius.