Rectangle and circle

The rectangle ABCD has side lengths a = 40 mm and b = 30 mm and is circumscribed by a circle k. Calculate approximately how many centimeters a circle is long.

Correct answer:

x =  15.71 cm

Step-by-step explanation:

a=40 mm b=30 mm d=a2+b2=402+302=50 mm o=π d=3.1416 50157.0796 mm  x=o cm=o:10  cm=157.0796:10  cm=15.71 cm=15.71 cm



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