A
a closed figure formed from line segments that meet only at their endpoints
polygon
to cross over one another (overlap)
intersect
a straight path extending in both directions with no endpoints
line
a part of a line defined by two endpoints
line segment
equal distances apart never touching
parallel
a polygon with six sides
hexagon
two rays that share an endpoint
angles
a part of a line that begins at one endpoint and extends forever in only one direction
ray
the distance between two points
interval
an arrangement of objects, usually in rows and columns, to show repeated addition multiplication
array
a polygon with five sides
pentagon
two lines that cross as exactly one point
intersecting lines
an angle with a measure greater than 90 degrees and less than 180 degrees
obtuse angle
two lines that intersect to form right angles
perpendicular lines
an angle that measures exactly 90 degrees
right angle
a polygon with three sides
triangle
lines in a plane that stay exactly the same distance
parallel lines
a triangle that has one 90 degree angle
right triangle
a figure that lies on a flat surface
place figure
a four-sided polygon
quadrilateral