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for the 1/21/2010 mr humphries math test

acute angle

an angle under 90 degrees

acute triangle

a triangle with all acute angles


2 rays that share a common endpoint

central angle

angle that has the center of a circle its vertex


a line segment that connects 2 points on a circle


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

complementary angles

2 angles that complete a right angle


having the same measure


a line segment that connects 2 points not already connected


a chord that goes through the origin

equilateral triangle

a triangle that has all sides congruent

isosceles triangle

a triangle that has 2 sides congruent

scalene triangle

a triangle that has no sides congruent


a quadrilateral with a pair of pairs of adjacent congruent sides


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

line segment

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

obtuse angle

an angle over 90 degrees

obtuse triangle

a triangle with at least 1 angle over 90 degrees

parallel lines

lines that are on the same plane and never intersect


a quadrilateral with a pair of pairs of parallel lines

perpendicular lines

lines that intersect at a right angle


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


0-D, an exact location in space


a closed figure made of three or more line segments


1/2 of a diameter


has 1 endpoint and extends infinetly in the other direction


an equiangular figure


when a figure flips across the line of reflection


equilateral and equiangular


a parallelogram,quadrilateral with all sides congruent

right angle

angle at exactly 90 degrees

right triangle

a triangle with one right angle


when a figure turns around a fixed point


wedge shape created by the central angle

skew lines

non collinear lines that don't intersect


equilateral and equiangular polygon

straight angle

a 180 degree angle

supplementary angles

supply a straight angle

transversal lines

intersect parallel lines


1 paip of parallel sides


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

vertical angles

formed by two intersecting lines and are congruent

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