shapes and angles

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Across
  1. 4. An angle greater than right angle.
  2. 6. An angle which measures 90 degrees.
  3. 7. A closed plane figure with five sides and five angles.
  4. 8. An angle of 180 degrees.
Down
  1. 1. A closed four sided figure.
  2. 2. An angle which is less than a right angle.
  3. 3. A closed plane figure with nine sides and nine angles.
  4. 5. A point at which two line segments or rays meet.