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20 Cards in this Set

  • Front
  • Back
a point
a location in space having no measure
a line
straight extending infinitely in two directions.
a ray
straight extending infinitely in one direction
a segment
straight and has a finite length
a plane
a flat surface extending infinitely in all directions
collinear
points in a straight line
parallel lines
lines that never intersect
perpendicular lines
intersect to form right angles
midpoint
seperates a segmen into two equal parts
congruent
having equal measure
acute angle
an angle that measures between 0 and 90 degrees
right angle
measures exactly 90 degrees
an obtuse angle
measures between 90 and 180 degrees
a straight angle
measures exactly 180 degrees
reflex angle
measures between 180 and 360
complementary angles
add up to 90 degrees
supplementary angles
add up to 180 degrees
vertical angles
opposite angles formed by intersecting lines
adjacent angles
next to eachother and have the same vertex
transversal
a line that intersects two other lines at different points