Math Dictionary r
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The angle made by taking the radius and wrapping it along the edge of the circle.
One Radian is 180/π degrees, or about 57.296°
The root of a quantity as indicated by the radical sign.
A line segment drawn from the center of a circle to a point on the circle.
Without order. Not able to be predicted. Happening by chance.
The difference between the lowest and highest values.
Range of a function :
The set of all output values of a function.
Rate = distance traveled / time taken. Its unit is either m/s or km/h.
A ratio shows the relative sizes of two or more values.
Ratios can be shown in different ways. Using the ":" to separate example values, or as a single number by dividing one value by the total.
Rational Expression :
An expression that is the ratio of two polynomials.
Rational Number :
Any number that can be made by dividing one integer by another. The word comes from "ratio".
Given any two points A and B , AB is equal to the union of AB and all of those points.
Real Number :
Positive or negative, large or small, whole numbers or decimal numbers are all Real Numbers.
A true statement justifying a step in a proof; the use of logic, examples, etc. to determine a result.
A parallelogram containing one right angle; a quadrilateral with four right angles.(from math dictionary r)
An ordered pair of real numbers that establishes the location of a point in a coordinate plane using the distances from two perpendicular intersecting lines called the coordinate axes. (See also Cartesian coordinates.)
Rectangular Prism (Cuboid) :
A solid (3-dimensional) object which has six faces that are rectangles.
Recurring Decimal :
A decimal number that has digits that repeat forever.
An isometry where if l is any line and P is any point not on l , then rl (P) = P' where l is the perpendicular bisector of PP' and if P∈l then rl
(P) = P .
Reflexive property of equality:
A property of real numbers that states
a = a .
Reflex angle :
A Reflex Angle is more than 180° but less than 360°
Regular polygon :
A polygon which is both equilateral and equiangular.
A pyramid whose base is a regular polygon and whose lateral faces are congruent isosceles triangles.
Remote interior angles:
Either interior angle of a triangle that is not adjacent to a given exterior angle of the triangle. Also called non-adjacent interior angles.
The domain resulting from a restriction placed on a function, based on the context of the problem.
A parallelogram with two adjacent congruent sides; a quadrilateral with four congruent sides.
An angle formed by two perpendicular lines, the measure of which is 90°.
Right circular cylinder:
A cylinder whose bases are circles and whose altitude passes through the center of both bases.
Right Angle :
A right angle is an angle which is equal to 90°, one quarter of a full revolution.
Right circular cone:
A cone whose base is a circle and whose altitude passes through the center of its base.
A pyramid whose lateral faces are isosceles triangles.
A triangle with one right angle.
Roman Numerals :
How ancient Romans used to write numbers.
I, V, X, L, C, D, M are the symbols used.
Where a function equals zero.
An isometry where if P is a fixed point in the plane, θ is any angle and A ≠ P then ' Rp,θ
(A) = A' where m∠APA' =θ and Rp,θ
(P) = P
A geometric figure has rotational symmetry if the figure is the image of itself under a rotation about a point through any angle whose measure is not a multiple of 3600
.A regular hexagon has rotational symmetry of 600
, and 3000
(from math dictionary r)
How far a line goes along (for a given distance going up).
Rise/Run gives you the slope of the line.
Math dictionary r
From math dictionary r to math dictionary
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