The Facts On File Algebra Handbook

vertex 1. The common point from which two lines form an ANGLE.

2. The point on a TRIANGLEthat is opposite the base of the triangle.
   vertical anglesANGLEs on the opposite sides of a VERTEX, formed by two
   lines intersecting.
   vertical axisThe y-axis in a CARTESIAN COORDINATE SYSTEMgraph.

vertical lineA line on a GRAPHthat has no SLOPEand intersects the x-axis at

only one point.

volume The amount of space that a three-dimensional SOLIDoccupies. For

example, the solid space of a CUBE, acylinder, or a SPHEREis the

volume. Volume is measured in CUBIC UNITs.

See alsoSECTION IV CHARTS AND TABLES.

whole numberAny number that is not a FRACTION, beginning with zero.

See alsoSECTION IV CHARTS AND TABLES.

x 1. A common VARIABLEused in algebra to signify an unknown quantity.

2. The variable used to signify the HORIZONTAL LINEin a Cartesian
   GRAPH(x-axis).
   x-axis The HORIZONTAL AXIS(horizontal NUMBER LINE) in a CARTESIAN
   COORDINATE SYSTEMgraph. POSITIVE NUMBERs are to the right of the
   ORIGINon the x-axis, and NEGATIVE NUMBERs are to the left of the
   origin on the x-axis.

x-interceptThe point on a GRAPHin which a LINE SEGMENTintersects the

x-axis, which is when y= 0.

vertex – x-intercept GLOSSARY

vertex – x-intercept GLOSSARY

base

vertex

vertex

base

vertex

Vertex

x

y

vertical

line

Vertical line