Geometry

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Across
  1. 4. a pair of adjacent angles with noncommon sides that are opposite rays
  2. 6. two angles with measures that have a sum of 180 degrees
  3. 8. 90 degree angle
  4. 9. two nonadjacent angles formed by two intersecting lines
Down
  1. 1. Bigger than a 90 degree angle
  2. 2. two angles with measures that have a sum of 90 degrees
  3. 3. Two angles that lie in the same plane and have a common vertex and side
  4. 5. Half of a 90 degree angle
  5. 7. lines, segments, or rays that form right angles