TRIGOZZLES

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Across
  1. 3. The movement of the star against the background as we orbit the Sun
  2. 4. sina/cosA
  3. 6. another name for clinometer
  4. 7. right-angle triangles each of which is a two-dimensional triangle with one angle equal to 90 degrees
  5. 9. longest side of a right traingle
  6. 10. hypotenuse side/adjacentside
Down
  1. 1. from Greek trigōnon, "triangle" and metron, "measure")
  2. 2. is an instrument for measuring angles of slope
  3. 5. father of trignometry
  4. 8. a navigational instrument that shows four direction points.