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Obtuse - An angle greater than 90 degrees.
Odd number - A whole number
(Integer) which is not
divisible by two.
When divided by two, there is a
remainder of one, the
answer ends in one-half (0.5 or 1/2). An odd number ends in
1, 3, 5, 7 or 9. See
Even number.
See the explanation on
Divisibility Tests.
Opposite leg - The side of a right triangle across from the measured angle. The side of a right triangle which does not have the vertex of the reference angle (measured angle) as an endpoint. The side of a right triangle not adjacent to (next to) the measured angle. See trigonometry.
Opposite numbers - Two numbers which add up to zero. One number is positive; the other is negative. The numbers have equal magnitude but not the same value. See absolute value, opposite signs.
Opposite side of a triangle - The side of a triangle across from the measured angle. The side of a triangle which does not have the vertex of the reference angle (measured angle) as an endpoint. The side of a triangle not adjacent to (next to) the measured angle.
Opposite side of a quadrilateral - The side of a quadrilateral across from the measured side. The side of a quadrilateral which does not have an endpoint of the measured side as an endpoint. The side of a quadrilateral not adjacent to (next to) the measured side.
Opposite signs - One number is positive; another is negative. See absolute value, opposite numbers.
Order of a computation - The class of the approximate
number of steps it takes to
complete a given computation or type of computation
(algorithm,
expressed in terms of one or more of the following:
linear (n),
power (nm),
factorial (n!),
logarithm (log(n)), etc. or a combination of the above. For example, a procedure (algorithm) may be of order n2log(n). Coefficients for scaling the relative
value of each type of order are generally inconsequential.
Order of an expression - The highest
power of an expression. Names:
0=constant,
1=linear,
2=quadratic,
3=cubic,
4=quartic, etc.
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Last updated 6/2/97 - 4/25/2000.