Geometry crossword

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Across
  1. 3. what shape has four even sides?
  2. 4. what type of shape has four sides?
  3. 6. what shape has ten sides?
  4. 9. how many sides does a heptagon have?
  5. 12. what shape includes four 90 degree angles?
  6. 13. how many even sides does an isosceles triangle have?
  7. 14. what shape has two sets of parallel lines
  8. 15. a concave polygon has what type of angle
Down
  1. 1. what shape has one round side?
  2. 2. What do you call two lines that are facing the same direction and stay the same length apart?
  3. 3. what type of triangle has no equal angles or sides?
  4. 5. what is another name for a trapezoid?
  5. 7. an obtuse angle is more than what degrees?
  6. 8. a shape with all sides equal and all angles equal
  7. 10. what type of polygon has no reflex angles?
  8. 11. what is the sum of two octagons?