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63 Cards in this Set
- Front
- Back
adjacent angles
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two angles that share both a side and a vertex
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supplementary angles
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two angles whose sum is exactly 180 degrees
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perpendicular lines
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lines that intersect and form a right angle
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line
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a straight path that extends without end in opposite directions
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parallel lines
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lines in the same plane that never intersect
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protractor
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a device for measuring angles
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skew lines
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lines that are not in the same plane and do not intersect
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straight angle
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an angle that measures exactly 180 degrees
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point
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an exact location
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vertical angles
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a pair of opposite congruent angles formed by intersecting lines
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plane
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a flat surface that extends without end in all directions
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obtuse angle
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an angle that measures more than 90 degrees
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angle
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formed by two rays with a common endpoint
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acute angle
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an angle that measures less than 90 degrees
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complementary angles
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two angles whose sum is exactly 90 degrees
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congruent angles
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angles that have the same measure
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intersecting lines
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lines that cross at one common point
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vertex
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the point of an angle where the two sides intersect
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line segment
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made of two endpoints and all the points between the endpoints
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right angle
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an angle that measures exactly 90 degrees
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ray
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has one endpoint, then extends without end in one direction only
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polygon
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a closed plane figure made up of several line segments
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regular polygon
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a polygon in which all the sides and angles are congruent
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obtuse triangle
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a triangle with an obtuse angle
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isosceles triangle
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a triangle with at least 2 equal sides
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pentagon
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a five sided polygon
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congruent
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having the same size and shape
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scalene triangle
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a triangle with three unequal sides
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triangle
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a three sided polygon
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rectangle
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a parallelogram with four right angles
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hexagon
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a six sided figure
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rhombus
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a parallelogram with four congruent sides
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acute triangle
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a triangle with all acute angles
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parallelogram
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a quadrilateral where opposite sides are parallel and congruent
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equilateral triangle
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a triangle with three equal sides
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square
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a special rectangle with four congruent sides; a special rhombus with four right angles
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octagon
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an eight sided polygon
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quadrilateral
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a four sided polygon
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right triangle
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a triangle with a right angle
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trapezoid
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a quadrilateral that has exactly one pair of parallel sides
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translation
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movement of a figure along a straight line
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reflection
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flips a figure over a line, creating a mirror-image
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transformation
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moves a figure without changing its shape or size
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line of reflection
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a line that a figure is flipped across to create a mirror-image
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line of symmetry
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the line that reflects a geometric figure into two congruent portions
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symmetry
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when half of a figure is an exact mirror-image of the other(it can be folded or reflected so that the two parts of thefigure match, or are congruent)
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tessalation
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a repeating arrangment of one or more shapes that completely cover a plane with no gaps and no overlaps
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median
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the middle value when the data is arranged in numerical order
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similar
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figures that have exactly the same shape but not necessarily the same size
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range
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the difference between the least and greatest value in the set
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percent
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ratio of a number to 100
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mean
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the sum of all the items, divided by the number of items in the set
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tip
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an amount added to a bill for service
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equivalent ratio
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ratios that name the same comparison
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corresponding angles
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angles in a figure that are congruent
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mode
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the value or values that occur the most in a set of data
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sales tax
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amount added to the prices of an item
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proportion
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an equation that shows that 2 ratios are equivalent
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ratio
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comparison of 2 quantities using division
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corresponding sides
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lengths in a figure that are proportion
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discount
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an amount that is subtrcted from the regular price of an item
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unit rate
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a rate when the second quantity is to one unit
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rate
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ratio that compares 2 quantities that have different units
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