The flashcards below were created by user
kdawnem
on FreezingBlue Flashcards.
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Acute angle
an angle with a measure between 0 degrees and 90 degrees
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Acute triangle
has three acute angles
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Angle
If formed by two rays with a common endpoint called a vertex
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Central angle
has its vertex at the center of a circle
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Circle
The set of points in a plane that are all the same distance from a given point called the center
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Chord
A segment that has both endpoints on a circle
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Complementary angles
Twoangles whose sum of their angle measures equals 90 degrees
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Congruent
Having the same shape and same size
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Decagon
A polygon with 10 sides
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Diameter
A segment that passes through the center of a circle and has both endpoints on the circle
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Equilateral triangle
Has 3 equal sides and 3 equal angle measures
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Hexagon
A polygon with 6 sides
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Isosceles triangle
A polygon that has 2 congruent sides and 2 congruent angles
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Line
A series of points that extends in two opposite directions without end
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Intersecting lines
Lie in the same plane and have exactly on point in common
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Line segment
Formed by 2 endpoints and all the points between them
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Obtuse angle
Has a measure greater than 90 degrees and less than 180 degrees
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Obtuse triangle
A triangle that has one angle measure that is greater than 90 degrees
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Octagon
A polygon that has 8 sides
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Parallelogram
A quadrilateral that has two pairs of parallel line
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Parallel lines
Two lines that are in the same plane, equal distance apart and never touch
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Plane
A flat surface with no thickness that extends without end in all directions on the surface
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Pentagon
A polygon that has 5 sides
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Perpendicular lines
A pair of intersecting lines that for right angles
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Point
A location in space that has no size
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Radius
A segment that connects the center to the circle
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Ray
has one endpoint and all the points of the line on one side of the endpoint
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rectangle
a parallelogram with four right angles
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right angle
has a measure of 90 degrees
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right triangle
has one angle that measure 90 degrees
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rhombus
a parallelogram with four congruent sides
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scalene triangle
has no congruent sides
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semicircle
half of a circle
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square
a parallelogram with four right angles and four congruent sides
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supplementary angles
two angles whose measures add up to 180 degrees
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straight angle
an angle with a measure of exactly 180 degrees
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trapezoid
a quadrilateral that has one pair of parallel lines
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