+triangles

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Across
  1. 7. a polygon with equal sides and angles
  2. 8. two lines at right angles to each other
  3. 10. angle an angle of 180°
  4. 11. a line that intersects two or more other lines
Down
  1. 1. a triangle has an angle greater than 90 degree
  2. 2. two angles whose sum is 180°
  3. 3. two straight lines that do not intersect
  4. 4. identical in size and shape
  5. 5. a triangle has angles less than 90 degree.
  6. 6. a triangle has two equal sides and angles
  7. 7. a triangle has a 90 degree angle
  8. 9. two angles or sides next to each other
  9. 12. a triangle has different sides and angles