Geometry

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Across
  1. 6. A logical step-by-step argument that shows a statement is true.
  2. 7. The unit used to measure angles.
  3. 10. A shape with four equal sides and four right angles.
  4. 11. The space between two lines that meet.
  5. 13. An angle that measures exactly ninety degrees.
  6. 15. An angle that measures less than ninety degrees.
Down
  1. 1. A flat, two-dimensional surface.
  2. 2. One of the straight lines that makes up a shape.
  3. 3. An angle that measures more than ninety degrees.
  4. 4. An exact position or location in space.
  5. 5. The amount of space inside a flat shape.
  6. 8. The distance from the center of a circle to its edge.
  7. 9. A corner where two lines or sides meet.
  8. 12. A straight path that goes on forever in both directions.
  9. 14. A straight path with one endpoint that goes on forever.