Math crossword puzzle part 2

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Across
  1. 3. x=5 4x+14=?
  2. 4. 5*2x=?
  3. 6. In a isosceles triangle the top angle is 80° how many is the one angle below?
  4. 7. how many degrees are there in a rectangle?
  5. 9. In a rectangle how many is the corner angles?
  6. 10. xy(x+y)
  7. 13. In a triangle a=110°, b=10°, c=?
Down
  1. 1. In a parallelogram a=110°, b=x, c=110°, d=x how many is x?
  2. 2. how many sides are there in a decagon?
  3. 3. 3*3*3+y*y*y*y*y
  4. 4. x=3 5x=?
  5. 5. x(x^2-y)
  6. 6. how many angles are there in a pentagon?
  7. 8. how many degrees are there in a straight line?
  8. 11. x*x*x*x*x
  9. 12. 13*2x=?