Shared Flashcard Set

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Mrs. Jackson S7 Gold
Vocabulary for Math Test
46
Mathematics
7th Grade
01/22/2013

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Cards

Term
Acute(Angle)
Definition
An angle that measures less than 90 degrees
Term
Acute Triangle
Definition
A triangle with all angles measured less than 90 degrees
Term
Angle
Definition
A figure formed by 2 rays with a common end point called a vertex
Term
Center of Rotation
Definition
The point about which a figure is rotated
Term
Correspondence
Definition
The relationship between two or more objects that are matched
Term
Complementary (Angles)
Definition
Two angles whose measures add up to 90 degrees
Term
Congruent
Definition
Having the same size and shape
Term
Equilateral Triangle
Definition
A triangle with three congruent sides
Term
Image
Definition
A figure resulting from a transformation
Term
Isosceles Triangle
Definition
A triangle with at least two congruent sides
Term
Line
Definition
A straight path that extends without ends in opposite directions
Term
Line of Symmetry
Definition
The imaginary "Mirror" in line symmetry
Term
Line Symmetry
Definition
A figure has line symmetry if one half is a mirror image of the other
Term
Obtuse (Angle)
Definition
Angle whose measure is slightly greater than 90 degrees but less than 180 degrees
Term
Obtuse Triangle
Definition
A triangle containing one obtuse angle
Term
Parallel Lines
Definition
Lines in a plane that do not intersect
Term
Parallelogram
Definition
A quadrilateral with 2 pairs of parallel sides
Term
Perpendicular Lines
Definition
Lines that intersect to form right angles
Term
Plane
Definition
A flat surface that extends forever
Term
Point
Definition
An exact location in space
Term
Polygon
Definition
A closed plane figure formed by three or more line segments that intersect only at their endpoints (Vertices)
Term
Ray
Definition
A part of a line that starts at one point and extends forever
Term
Rectangle
Definition
A parallelogram with four right angles
Term
Reflection
Definition
A transformation of a figure that flips the figure across a line
Term
Regular Polygon
Definition
A polygon with congruent sides and angles
Term
Regular Tessellation
Definition
A pattern made by repeating a regular polygon
Term
Rhombus
Definition
A parallelogram with all sides congruent
Term
Right (Angle)
Definition
An angle that measures 90 degrees
Term
Right Triangle
Definition
A triangle containing a right angle
Term
Rise
Definition
The vertical change when the slope of a line is expressed as the ratio rise over run
Term
Rotation
Definition
A transformation in which a figure is turned around a point
Term
Rotational Symmetry
Definition
A figure has rotational symmetry if it can be rotated less than 360 degrees around a center point and coincide with the original figure
Term
Run
Definition
The horizontal change when the slope of a line is expressed as the ratio rise over run
Term
Scalene Triangle
Definition
A triangle with no congruent sides
Term
Segment
Definition
A part of a line between two endpoints
Term
Slope
Definition
A measure of the steepness of a line on a graph; the rise divided by the run
Term
Square
Definition
A rectangle with four congruent sides
Term
Supplementary (Angles)
Definition
Two angles whose measures have a sum of 180 degrees
Term
Transversal
Definition
A line that intersects two or more lines
Term
Trapezoid
Definition
A quadrilateral with exactly one pair of parallel sides
Term
Translation
Definition
A movement (Slide) of a figure along a straight line
Term
Triangle Sum Theorem
Definition
The theorem that states that the measures of the angles in a triangle add up to 180 degrees
Term
Tessellation
Definition
A repeating pattern of a plane that completely cover a plane with no gaps or overlaps
Term
Transformation
Definition
A change in the size or position of a figure
Term
Vertical Angles
Definition
A pair of opposite congruent angles formed by intersecting lines
Term
Holt Mathematics Course 3
Definition
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