1/15 Geometry Vocab Test Flashcards
two rays that meet at a common endpoint
Angle
an angle with a measure less than 90°
Acute angle
the set of all points that lie the same distance from the center and lie in the same plane
Circle
same size and same shape
Congruent
a polygon with 6 sides 6 angles and 6 vertices
Hexagon
a set of points that form a straight path that goes in opposite directions without ending
line
part of a line between two endpoints
Line segment
an angle whose measure is greater than 90° but less than 180°
Obtuse angle
a polygon with 8 sides 8 angles and 8 vertices
Octagon
lines that lie in the same plane never intersect and are the same distance apart
Parallel lines
four-sided (quadrilateral) polygon with opposite sides parallel and opposite sides congruent
Parallelogram
lines that intersect at right angles (90°) to each other
Perpendicular lines
a polygon with 5 sides 5 angles and 5 vertices
Pentagon
a flat surface that goes on forever in all directions
plane
an exact location in space represented by a dot
Point
a closed figure made by joining line segments where each line segment intersects exactly two others only at the endpoints
Polygon
any four-sided polygon
Quadrilateral
part of a line that has one endpoint and continues without end in one direction
Ray
four-sided polygon (quadrilateral) with 4 right (90°) angles adjacent sides perpendicular opposite sides congruent and opposite sides parallel
Rectangle
an angle that measures 90° with lines that are at a right angle to each other are perpendicular
Right angle
four-sided polygon (quadrilateral) having all four sides congruent and opposite sides parallel
Rhombus
four-sided polygon (quadrilateral) with all sides congruent and opposite sides parallel with 4 right (90°) angles and adjacent sides perpendicular
Square
four-sided polygon (quadrilateral) with exactly one pair of parallel sides
Trapezoid
a polygon with 3 sides 3 angles and 3 vertices
Triangle
