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### Geometry terms from 7th grade textbook

a location point
a series of points that extend in opposite directions without end line
part of a line with one endpoint and all the points of the line on one side of the endpoint. ray
part of a line with two endpoints and all points in between segment
one angle that is 90 degrees right angle
lines in the same plane that never intersect parallel lines
a figure formed by two rays with a common endpoint angle
a flat surface that extends indefinitely in all directions and has no thickness plane
when the sum of 2 angles is 180 degrees supplementary
when the sum of the measures of two angles are 90 degrees complementary
lines that have exactly one point in common intersecting lines
an angle between 90 degrees and 180 degrees obtuse angle
the point of intersection of two sides of an angle or figure vertex
lines that lie in different planes skew lines
angles that are formed by two intersecting lines and are opposite each other vertical angles
angles that share a vertex and a side but have no interior points in common adjacent angles
an angle with a measure between 0 degrees and 90 degrees acute angle
one angle that measures 180 degrees straight angle
angles with equal measures congruent angles
quadrilateral with 4 right angles and 4 congruent sides square
a segment that passes through the center of a circle and has both endpoints on the circle diameter
the point that divides a segment into two segments of equal length midpoint
lines that intersect to form right angles perpendicular lines
a line, segment, or ray that goes through the midpoint of a segment segment bisector
all sides congruent and all angles congruent regular polygon
a polygon with 8 sides octagon
a triangle with 3 congruent sides equilateral triangle
same size and same shape congruent
half of a circle semicircle
an angle with its vertex at the center of a circle central angle
quadrilateral with 4 congruent sides rhombus
quadrilateral with 2 pairs of opposite sides parallel parallelogram
a polygon with 6 sides hexagon
a triangle with 2 congruent sides isosceles triangle
a segment that has both endpoints on the circle chord
part of a circle arc
a quadrilateral with exactly one pair of parallel sides trapezoid
a polygon with 4 sides quadrilateral
set of points in a plane that are all the same distance from a given point, called the center circle
a segment that connects the center of a circle to the circle radius
sides are not congruent or all angles are not congruent irregular polygon
a polygon with 4 sides decagon
a triangle with no congruent sides scalene triangle
quadrilateral with 4 right angles rectangle
a polygon with 5 sides pentagon
the number of square units a figures encloses area
segment formed by the intersection of two faces edge
a perpendicular segment connecting one to another base
a figure with two congruent parallel bases that are circles cylinder
the middle point of a sphere center of a sphere
a cube whose edges are one unit long cubic unit
the distance around a circle circumference
a rectangular prism whose faces are all squares cube
a three-dimensional figure with one circular base and one vertex cone
a three-dimensional figure with two parallel and congruent polygon faces prism
a number that is the square of an integer perfect square
a flat surface of a three-dimensional figure that is a polygon face
how tall a polygon or a polyhedron is height
the ratio of the circumference of any circle to its diameter pi
the distance around a figure perimeter
in a right triangle, the hypotenuse is the longest side, which is opposite the right angle hypotenuse
a number that cannot be written as the ratio of two integers irrational number
a two-dimensional pattern that can be folded into a three-dimensional figure net
the two shortest sides of a triangle legs
a three-dimensional figure with triangular faces that meet at a vertex and a base that is a polygon pyramid
A squared plus B squared equals C squared Pythagorean Theorem
the number of cubic units needed to fill the space of a figure volume
any point where two sides meet a polygon vertex
is the set of all points in a space that are the same distance from the center sphere
a number is the inverse of squaring a number square root
figures that do not lie in a plane three-dimensional figure
the sum of the areas of its faces surface area
Created by: connie1