Math

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Across
  1. 3. A quadrilateral with four equal sides
  2. 6. The quadrilateral with two pairs of parallel sides
  3. 7. The line that is extended from only one terminal without limit
  4. 8. A quadrilateral with four right angles
  5. 9. The sum of their measures at a point is 360°
  6. 12. Two angles their sum equals 180°
Down
  1. 1. An angle that equals to 90°
  2. 2. An angle that is greater than 90° and less than 180°
  3. 4. A quadrilateral with four equal sides and four right angles
  4. 5. Two angles have a common side and common vertex and the other two sides on the opposite directions from the common side
  5. 7. An angle that is greater than 180° and less than 360°
  6. 10. Two angles their sum equals 90°
  7. 11. The union of two rays with the same starting point
  8. 12. An angle that equals to 180°
  9. 13. An angle that is less than 90° and greater than 0°