x - MathnMind

Words to Review
Give an example of the vocabulary word.
Distance formula
The distance between
(26, 3) and (2, 5) is
(5 2 3) 2 1 (2 1 6) 2
d 5 Ï }}
68 .
5 Ï }
Focus, foci
The focus for the
parabola x 2 5 24y is
(0, 21).
Circle
1
y
1
x 2 1 y 2 5 4
Radius
The radius of the circle
x2 1 y2 5 4 is
r 5 Ï }
4 5 2.
Vertices
The vertices of the
ellipse x2
}
9
(63, 0).
x
y2
1 } 5 1 are
4
Midpoint formula
The midpoint of the
line from (26, 3) to
(2, 5) is
26 1 2 3 1 5
1 } , }
2 2 2 5 (22, 4).
Directrix
The directrix for the
parabola x 2 5 24y is
y 5 1.
Center
The center of the circle
x 2 1 y 2 5 4 is (0, 0).
Ellipse
Copyright © Holt McDougal. All rights reserved. Words to Review Algebra 2 Notetaking Guide 259
x2
}
9
1
y
1
y2
1 } 5 1
4
Major axis
The major axis for
x2 y2
} 1 } 5 1 is
9 4
horizontal (y 5 0).
x