if 16.1cm is a radius of circle: # Area= Pi X R{2} = 3.141592654 X 16.1 square = 814.3 cm square # circumference= Pi X 2 X R = 3.141592654 X 2 X 16.1 = 101.2 cm # if 16.1 is a diameter: #Area= Pi X D/2 square = 3.141592654 X 16.1 divide by 2 square = 203.6 cm square #Circumference= Pi X D = 3.141592654 X 16.1 =50.6 cm
That's it it. a bit long cuz I dun know what exactly what they given Radius or Diametre.
