7.     State the number of lines of symmetry for the following figures:

              (a) An equilateral triangle       (b) An isosceles triangle           (c) A scalene triangle
              (d) A square                           (e) A rectangle                           (f) A rhombus
              (g) A parallelogram                (h) A quadrilateral                      (i) A regular hexagon
              (j) A circle

Answers (1)

  (a) An equilateral triangle      

  The number of lines of symmetry  = 3

(b) An isosceles triangle  

  The number of lines of symmetry  = 1

        

(c) A scalene triangle

  The number of lines of symmetry  = 0

 (d) A square

     The number of lines of symmetry  = 4

                          

(e) A rectangle                          

  The number of lines of symmetry  = 2

(f) A rhombus

  The number of lines of symmetry  = 2

 (g) A parallelogram               

  The number of lines of symmetry  = 0

(h) A quadrilateral                     

  The number of lines of symmetry  = 0

(i) A regular hexagon

  The number of lines of symmetry  = 6

(j) A circle

  The number of lines of symmetry  = infinite

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