Perimeter of circle

Calculate the circumference of a described circle to the triangle with sides 9,12,15 cm.

Correct answer:

o =  47.1239 cm

Step-by-step explanation:

c=15 c2=a2+b2 152=122+92  D=c=15 cm  o=π D=3.1416 15=47.1239 cm



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