Pythagorean Puzzle

123456
Across
  1. 2. the numbers that are almost always found after finding the hypotenuse
  2. 4. the thing that represents the missing length
  3. 5. longest line in any right triangle
  4. 6. triangle a triangle with a 90 degree angle
Down
  1. 1. a^2+b^2=c^2
  2. 3. ^2