An arrangement of data in rows and columns.
Model for Subtraction
If a quantity
y is taken away from an original quantity x with the
same units, the quantity left is x - y.
A line, ray, segment, or plane which intersects a curve or curved surface
in exactly one point.
of an angle The
ratio (length of leg opposite to the angle/length of leg adjacent to the
angle) in a right triangle. Abbreviated tan.
Two circles that have exactly one point in common.
EX: Here we see a
design made of lots of tangent circles.
A word name
The endpoint of a vector.
A decimal that ends. Also called finite decimal.
Numbers or products of numbers and variables that are added.
Ex: 3x +-8xy + 9 is
an expression with three terms.
also has three terms, remember the last subtraction here can be written
as + .
A filling up of a two-dimensional space by congruent copies of a figure
that do not overlap. The figure which is copied is commonly called the
A polyhedron with four faces.
A statement deduced from postulates, definitions, or other previously
A triangle in which the three angles measure 30, 60, and 90.
A system of coordinates used to locate points in space by their distances
and directions from three mutually perpendicular lines.
A figure whose points do not all lie in a single plane.
The movement of a figure in a plane from its original position, the preimage,
to a new position, the image. Also called a map. Transformations can occur
when there is a reflection, a rotation, a translation, or a glide reflection
of the original image.
A transformation in which every point
of the preimage moves in the same direction by the same amount to form
the image. A translation
is also referred to as a "slide".
The result of adding the same numbers to the coordinates of the points
in a figure. In the drawing above, triangle A'B'C' is the translation
image of triangle ABC. Also called slide image.
A line that
intersects two or more lines.
that has (at least) one pair of parallel sides.
*NOTE some definitions
omit the words at least.
A network in which all the arcs may be traced exactly once without picking
up the tracing instrument.
a network is only traversable if it has less than three odd nodes
(an odd node has an odd number of arcs entering it).
A problem-solving strategy in which various solutions are tried until
the correct solution is found.
A polygon with three sides.
In any triangle, the sum of the measures of the angles is 180°.
A triangle and the space inside it.
To split a polygon into nonoverlapping triangles. Triangulation is usually
used to help find the areas of polygons.
A ratio of the lengths of the sides in a right triangle.
A word name for 1,000,000,000,000 .
A word name
or .00000 00000 01.
To divide into three congruent parts.
To cut off a number at a particular decimal place. Truncation does not
mean that the decimal is rounded up, a part of it is simply cut off.
0.666666666666666 truncated to the hundredths place is 0.66.
*NOTE some calculators
are programmed to truncate and others to round up. A rounding calculator
with a ten digit display would show 0.666666667 for the decimal above.
The condition of a statement in logic; either true or false.
A transformation in which every point of the preimage is rotated by a
given angle about a point (in two dimensions) or a line (in three dimensions).They
are also called rotations.
A turn in the clockwise
direction is considered negative and one in the counterclockwise
direction is considered positive.
form of written proof in which the conclusions are written in one column
and the justifications are written beside them in a second column.
Pertaining to figures that lie in a single plane, or to their geometry.
This is "flat land" so to speak.