Geometry

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Across
  1. 4. / having the same shape and size
  2. 6. / an angle whose measurement is exactly 180º
  3. 7. / an angle whose measurement is more than 90º and less than 180º
Down
  1. 1. / a point in the exact middle of a line segment
  2. 2. / an angle whose measurement is more than 0º and less than 90º
  3. 3. / a polygon with seven sides and angles
  4. 5. / an angle whose measurement is exactly 90º