CIRCLES Flashcards
1
Q
a circle is a plane figure consisting of all points equidistant from a fixed point called
A
center
2
Q
the distance of the points from the center is called
A
the radius
3
Q
a point P(x,y) is on this circle if and only if
A
r = √(x-h)²+(y-k)²
- r is never negative
- r=radius
- (h,k) is the center
4
Q
standard form of the equation of a circle of a radius r and center (h,k)
A
(x-h)²+(y-k)²=r²
