Accelerated Geometry

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Across
  1. 1. -- meeting at a 90 degree angle
  2. 5. -- a 3-D figure with parallel congruent polygon bases and sides made of parallelograms
  3. 6. -- lines that never intersect in a plane
  4. 8. -- an angle measuring exactly 90 degrees
  5. 10. -- a triangle with one right angle
  6. 11. -- a triangle with one obtuse angle
  7. 13. -- a simple closed two-dimensional shape made of line segments
Down
  1. 1. -- a quadrilateral with two pair of parallel sides
  2. 2. -- the distance around a 2-D figure
  3. 3. -- an angle measuring between 90 and 180 degrees
  4. 4. -- the distance from the center to the circle
  5. 6. -- the sum of the squares of the legs of a right triangle equals the square of the hypotenuse; a2 + b2 = c2 where c is always the hypotenuse side
  6. 7. -- a 3-D figure with a polygon for a base and triangular faces meeting at a point at the top
  7. 9. -- a parallelogram with a right angle
  8. 12. -- a quadrilateral with four congruent sides