Geometry

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Across
  1. 3. If the sum of two angles is equal to 180 degrees, then they are said to be....
  2. 4. It can be extended indefinitely in either direction.
  3. 5. If two lines have more than one point in common, then they are said to be....
  4. 7. A 180 degree angle
Down
  1. 1. If the sum of two angles is equal to 90 degrees, then they are said to be....
  2. 2. If two lines have one point in common, then they are said to be....
  3. 3. A portion of a straight line that is limited by 2 points (extremities).
  4. 6. A zero degree angle