We have a square with a side 56 cm. We cut corners to make his octagon. What will be the side of the octagon?

Correct answer:

x =  21.4303 cm

Step-by-step explanation:

a=56 cm  α=π/8=3.1416/80.3927 rad r=a/2=56/2=28 cm  sinα=x/2:r  x=2 r sin(α)=2 28 sin0.3927=21.4303 cm

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