Perimeter

  • Square:
            Perimeter = 4a
  • Circle
            Perimeter = 2 กม pi กม r
  • Rectangle:
            Perimeter = 2a + 2b
  • Parallelogram:
            Perimeter = 2a + 2b
  • Triangle:
            Perimeter = a + b + c
  • Trapezoid:
            Perimeter = a + b + c + d
                                                  = 2m + c + d
  • Rhombus:
            Perimeter = 4a
  • Regular N-gon:
            Perimeter = ns, n = # of sides
  • Ellipse:

            


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