Warm up!

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Across
  1. 3. the leg across from the given angle of a right triangle
  2. 7. when looking up, the angle of ____________ is the angle formed an observer's line of sight and the horizontal line
  3. 8. the ratio defined as the opposite leg over the adjacent leg
  4. 10. according to the __________ theorem, the square of the hypotenuse of a right triangle is equal to the sum of the squares of its legs.
Down
  1. 1. the longest side of a right triangle
  2. 2. the ratio defined as the adjacent leg over the hypotenuse
  3. 4. the ratio defined as the opposite leg over the hypotenuse
  4. 5. the branch of mathematics studying the relationships between the angles and side lengths of triangles, particularly right-angled triangles.
  5. 6. a triangle with one right angle
  6. 9. the leg next to the angle of a right triangle