Maths crossword

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Across
  1. 3. Inverse of integrals
  2. 6. The study of triangles
  3. 10. Square root of negative one
Down
  1. 1. Real + Imaginary
  2. 2. The study of shapes
  3. 4. Repeated multiplication
  4. 5. The study of variables
  5. 7. Angle subtended at the center of a circle by an arc that is equal in length to the radius
  6. 8. Half angle
  7. 9. A complete angle