Geometry vocabulary

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Across
  1. 2. angle measuring less than 90°
  2. 4. A pair of adjacent angles whose non-common sides form a straight line.
  3. 6. angles that share a common side and vertex, next to each other.
  4. 7. angle measuring exactly 180°.
  5. 8. angle measuring exactly 90°.
  6. 9. angles that add up to 90°.
Down
  1. 1. angles opposite each other when two lines intersect.
  2. 3. angles that add up to 180°
  3. 5. angle measuring more than 90° but less than 180°.