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20 Cards in this Set

  • Front
  • Back
formed by two rays with a common vertex
angle
angle measuring less than 90 degrees
acute angle
angle measuring exactly 90 degrees
right angle
angle measuring more than 90 but less than 180 degrees
obtuse angle
extends forever in both directions
line
part of a line with two endpoints
line segment
part of a line with 1 end point extending in 1 direction
ray
the point where 2 lines meet
vertex
names an exact location
point
a flat surface that extends forever in all directions
plane
exactly the same shape but different sizes
similar
exactly the same size and shape
congruent
congruent angles that are opposite of each other and formed when two lines intersect
vertical angles
2 angles whose sum is 90 degrees
complementary angles
2 angles whose sum is 180 degrees
supplementary angles
the line that intersects 2 parallel lines
transversal
2 lines that never intersect
parallel lines
2 lines that cross to form right angles
perpendicular angles
angles that lie in the same location on parallel lines cut by a transversal
corresponding angles
angles that lie INSIDE 2 parallel lines but are on opposite sides of the transversal
alternate interior angles