Trigonometry

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Across
  1. 5. The position of an angle on a coordinate system in which the origin is the vertex and the initial side coincides with the positive x-axis
  2. 6. ratio of the adjacent side to the hypotenuse of a right-angled triangle
  3. 7. Angles that have the same initial side and terminal side
  4. 8. The endpoint of the ray
Down
  1. 1. The position after rotation of the ray
  2. 2. An angle less than 90 degrees
  3. 3. Measurement of triangles
  4. 4. The starting position of the ray