Geometry crosswords

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Across
  1. 3. a zoom ,magnification or reduction of the plane
  2. 5. its base is a polygon and for the faces of triangles having a common top.
  3. 7. The distance from the center to the circumference of a circle
  4. 8. right through a top of the triangle and perpendicular to the side opposite to this top
  5. 9. geometric transformation without rotation,turning or a deformation
  6. 10. Limited space of a figure, mesured by a formula and length of the figure
  7. 12. quadrilateral having two parallel opposite sides
  8. 14. half right through the top of an angle by cutting it into two equal angles
  9. 15. triangle with three sides of a same lenght
Down
  1. 1. The distance from one point on a circle through the center to another point on the circle
  2. 2. straight parallel sides and a cercle base
  3. 4. right through a top of the triangle and the side opposite that top
  4. 6. triangle with two sides of a same lenght
  5. 11. a solid with six sides whose base is a rectangle
  6. 13. quadrangle whose sides are all the same length, or a parallelogram having at least two consecutive sides of the same length.