Math vocab hunt

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Across
  1. 3. a graphing and description system for points and lines
  2. 5. the well-known geometric theorem that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse
  3. 6. a two-dimensional plane formed by the intersection of two number lines
  4. 8. the two sides that intersect to determine the right angle
  5. 9. a triangle having a right angle
  6. 12. a straight line passing through the center of a circle or sphere and meeting the circumference or surface at each end
  7. 14. If the square of the length of the longest side of a triangle is equal to the sum of the squares of the other two sides, then the triangle is a right triangle
  8. 15. a logical approach where you progress from general ideas to specific conclusions
  9. 17. a quantity of which a given quantity is the cube
  10. 18. a straight line extending from the center of a circle or sphere to the circumference or surface
Down
  1. 1. a number that cannot be exactly expressed as a ratio of two integers
  2. 2. the perpendicular drawn from the vertex of the triangle to the opposite side
  3. 4. a quantity of which a given quantity is the square
  4. 7. the surface, a solid object stands on or rests upon
  5. 10. the length of a perpendicular from the base to the point or points most distant from it
  6. 11. a distinctive three-dimensional geometric figure with a flat and curved surface pointed towards the top
  7. 13. a geometric figure or shape that has a three-dimensional structure
  8. 14. a three-dimensional solid that holds two parallel bases joined by a curved surface
  9. 16. the side of a right triangle opposite the right angle
  10. 18. a quantity expressed as a root of another quantity