Geometry

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Across
  1. 2. two angles whose measures have a sum of 90
  2. 4. a ratio between two sets of measurements
  3. 6. the sum of the areas of the faces, or surfaces, of a three-dimensional figure
  4. 7. a line segment that passes through the center of a circle and whose endpoints lie on the circle
  5. 11. a proportional two-dimensional drawing of an object
  6. 12. a line segment with one endpoint at the center of a circle and the other endpoint on the circle
  7. 13. the distance around a circle
Down
  1. 1. two angles whose measures have a sum of 180
  2. 3. the number of square units needed to cover a given surface
  3. 5. angles that have the same measure
  4. 8. opposite angles formed by two intersecting lines
  5. 9. pairs of angles that share a vertex and one side but do not overlap
  6. 10. the number of cubic units needed to fill a given space