Lines, Angles, Triangles

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Across
  1. 6. A triangle in which no sides have the same length
  2. 11. an angle that makes a square corner equaling 90 degrees
  3. 13. Two lines, line segments,or rays that make a right angle
  4. 15. an angle that is greater than 90 degrees
Down
  1. 1. A special parallelogram with four right angles.
  2. 2. A quadrilateral with two pairs of parallel sides.
  3. 3. Ms. Smith's Hogwarts house
  4. 4. A triangle in which two sides have the same length
  5. 5. Lines that cross at one point
  6. 7. A part of a line with only one endpoint
  7. 8. A triangle having three sides of the same length
  8. 9. A quadrilateral with exactly one pair of parallel sides
  9. 10. Lines that never touch
  10. 12. Today's holiday name
  11. 14. an angle that is less that 90 degrees