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