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for the 1/21/2010 mr humphries math test

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acute angle

an angle under 90 degrees

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acute triangle

a triangle with all acute angles

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angle

2 rays that share a common endpoint

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central angle

angle that has the center of a circle its vertex

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chord

a line segment that connects 2 points on a circle

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circle

a set of points in a plane equidistant from a point called the origin or the center

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complementary angles

2 angles that complete a right angle

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congruent

having the same measure

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diagonal

a line segment that connects 2 points not already connected

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diameter

a chord that goes through the origin

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equilateral triangle

a triangle that has all sides congruent

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isosceles triangle

a triangle that has 2 sides congruent

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scalene triangle

a triangle that has no sides congruent

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kite

a quadrilateral with a pair of pairs of adjacent congruent sides

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line

1-D a straight path that extends infinetly in opposite directions

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line segment

a part of a line or ray that extends between 2 endpoints

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obtuse angle

an angle over 90 degrees

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obtuse triangle

a triangle with at least 1 angle over 90 degrees

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parallel lines

lines that are on the same plane and never intersect

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parallelogram

a quadrilateral with a pair of pairs of parallel lines

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perpendicular lines

lines that intersect at a right angle

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plane

2-D, 3 points can name it and it extends infinetly in all directions

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point

0-D, an exact location in space

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polygon

a closed figure made of three or more line segments

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ray

has 1 endpoint and extends infinetly in the other direction

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rectangle

an equiangular figure

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reflection

when a figure flips across the line of reflection

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regular

equilateral and equiangular

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rhombus

a parallelogram,quadrilateral with all sides congruent

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right angle

angle at exactly 90 degrees

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right triangle

a triangle with one right angle

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rotation

when a figure turns around a fixed point

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sector

wedge shape created by the central angle

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skew lines

non collinear lines that don't intersect

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square

equilateral and equiangular polygon

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straight angle

a 180 degree angle

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supplementary angles

supply a straight angle

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transversal lines

intersect parallel lines

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trapezoid

1 paip of parallel sides

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vertex

a common endpoint for 2 line segments or rays or angles etc.

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vertical angles

formed by two intersecting lines and are congruent