keli85 keli85
  • 23-09-2018
  • Mathematics
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suspho
suspho suspho
  • 23-09-2018

CD = √(10²+6.8²) = 10.33

AC = √(14.2²+10²) = 17.36

AD = 14.2+6.8=21

21 +10.33+6.8=38.13 cm (perimeter) rounded 38 cm

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