1.   Which triangle is not similar to the other three?
   
    A. DEF B. GHI
    C. JKL D. ABC
    Hint

  2.   Which statement is true?
    A. Any two isosceles triangles are similar. B. Any two right triangles are similar.
    C. Any two triangles are similar. D. Any two equilateral triangles are similar.
    Hint

  3.   Which one of the triangles shown is not similar to the others?
   
    A. W B. Y
    C. X D. Z
    Hint

  4.   Find the value of x.
   
    A. 4.5 B. 7.5
    C. 5 D. 12.5
    Hint

  5.   What is a property that similarity of triangles does not have?
    A. symmetric B. reflexive
    C. commutative D. transitive
    Hint