Geometry

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Across
  1. 4. to fill the inside of a 3D figure
  2. 5. two angles that measure 90 degrees
  3. 6. two angles that share a common vertex
  4. 7. two angles that are congruent to each other
Down
  1. 1. two angles that measure 180 degrees
  2. 2. area the outside of a 3D figure
  3. 3. mirror image