Similar triangles

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Across
  1. 2. theorem in which DE||BC, AD/DB=AE/EC
  2. 7. b×h×1/2
  3. 8. same shape but different size
  4. 9. similarity criteria in which 3 sides of a triangle is equal
Down
  1. 1. theorem in which (h)^2=(b)^2+(p)^2 is called
  2. 3. similarity criteria in which all angles of a triangle is equal
  3. 4. same shape and same size
  4. 5. triangle in which sum of square of base and perpendicular is equal to square of hypotenuse
  5. 6. name this symbol~