Geometry Crossword Puzzle

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Across
  1. 3. when moving a shape 90 degrees clockwise on a graph.
  2. 7. times two of radius
  3. 8. half of diameter
  4. 10. a^2+b^2=c^2
  5. 13. 3.14
  6. 14. Obtuse acute and right
  7. 16. when lines intersect at a 90-degree angle.
  8. 19. 1/2 (base times height)
  9. 20. base times height.
Down
  1. 1. when adding up all the sides of a shape.
  2. 2. the length of any circle
  3. 4. two angles that are across from each other.
  4. 5. lines that will never touch on a graph.
  5. 6. U shape graph
  6. 9. When mirroring a shape over the y-axis.
  7. 11. the longest side on a right triangle.
  8. 12. when making a shape bigger or smaller.
  9. 15. when cutting a shape in half and both sides mirror.
  10. 17. When proving <A is congruent to <C.
  11. 18. when useing Tan, Sin or Cos to find missing side.